5
damn i hate fantastico, i don't think i've heard of any1 where it hasn't f*cked up their site one way or the other..
i can't help you exactly with this problem as i don't know anything about fantastico installs or how it updates.
the best way is to do it yourself via ftp and upload all the files yourself.
try emptying the contents of cache folder and templates_c, see if that produces any results. if not try solution below..
i would try downloading the XOOPS 2.0.10 zip and then uploading the contents of that to your server via ftp..
before you upload, make a backup of mainfile.php on your server. either that or actually remove that file from the archive on your pc before you upload.