Fatal error: Cannot instantiate non-existent class: xoopsxmlrss2parser in /home/preemie/public_html/cms/modules/xoopsheadline/class/headlinerenderer.php on line 151
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 283
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 284
Notice [PHP]: Undefined index: timezone_offset in file kernel/object.php line 381
Warning [Xoops]: Smarty error: unable to read resource: "db:system_block_dummy.html" in file class/smarty/Smarty.class.php line 1084
Warning [Xoops]: Smarty error: unable to read resource: "db:system_block_dummy.html" in file class/smarty/Smarty.class.php line 1084
Warning [Xoops]: Smarty error: unable to read resource: "db:system_block_dummy.html" in file class/smarty/Smarty.class.php line 1084
Warning [Xoops]: Smarty error: unable to read resource: "db:system_block_dummy.html" in file class/smarty/Smarty.class.php line 1084

clear the templates_c/ folder, and update the system module by going to system admin -> modules and clicking the 'update' icon.

Herko

Which XOOPS version are you using?

The fatal error should be with 2.11

Ah yes. I made a booger when importing the XML processing classes from GIJOE's XHLD module.

Renaming XmlRss2Parser to XoopsXmlRss2Parser and it will be available in CVS Nightly tomorrow. I can keep the tag handler class names without breaking it, right?

@ttremeth:
You are not desperate if you find a bug in an Alpha version. If you expect a stable version, please use XOOPS 2.0.10

did that and got


Unknown column 'user_icq' in 'field list'
INSERT INTO xoops_user_profile (profileid, user_icq, user_from, user_sig, user_viewemail, user_aim, user_yim, user_msnm, user_occ, url, bio, user_intrest, umode, uorder, notify_method, notify_mode, name, user_regdate, posts, attachsig, timezone_offset, user_mailok, theme, actkey, last_login) SELECT uid, user_icq, user_from, user_sig, user_viewemail, user_aim, user_yim, user_msnm, user_occ, url, bio, user_intrest, umode, uorder, notify_method, notify_mode, name, user_regdate, posts, attachsig, timezone_offset, user_mailok, theme, actkey, last_login FROM xoops_usersCan't DROP 'user_icq'. Check that column/key existsMultiple primary key definedCan't DROP 'block_id'. Check that column/key existsCan't DROP 'module_id'. Check that column/key exists
Fatal error: [] operator not supported for strings in /home/preemie/public_html/cms/kernel/module.php on line 1079
Notice [PHP]: Undefined index: theme in file kernel/object.php line 283
Notice [PHP]: Undefined index: theme in file kernel/object.php line 284
Notice [PHP]: Undefined index: theme in file kernel/object.php line 381
Notice [PHP]: Undefined index: theme_set_admin in file class/template.php line 305
Notice [PHP]: Undefined index: theme_set_admin in file class/template.php line 310
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218
Notice [PHP]: Undefined index: block_type in file modules/system/include/update.php line 182
Notice [PHP]: Undefined index: title in file modules/system/include/update.php line 212
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 214
Notice [PHP]: Undefined index: weight in file modules/system/include/update.php line 216
Notice [PHP]: Undefined index: visible in file modules/system/include/update.php line 217
Notice [PHP]: Undefined index: bcachetime in file modules/system/include/update.php line 218

What is it you try to do, when you get these errors? Can you give a little more background information?

Quote:

from 2.10 to 2.11 Can I go back to 2.1?

Quote:

Just trying to upgrade from 2.10. My stupid fault as thought it would work like previous upgrades but can I roll back to 2.10?

please read carefully:

XOOPS 2.0.10 is the stable version of XOOPS.
XOOPS 2.1.x is the unstable development version of XOOPS.

See the difference? XOOPS 2.1.1 is not an upgrade release for XOOPS 2.0.10, yet. It's been written here on the news, the latest release block, the comments, everywhere

Roll back to XOOPS 2.0.10 by uploading all the files from 2.0.10 stable package (except mainfile.php) to your server.

Herko