1. Check/Search the XOOPS Forums, FAQ and Wiki for your problem or similar reported bug
2. Make sure the problem IS reproduce-able (try to make it happen at least three times)
3. Report bugs ONLY in the bugs section, feature requests go to the features request section.
4. Be very clear in your report as to what the symptom is, the error code reported and module(s) affected and how to reproduce the error
5. Chose the proper "Category" and "Group" when adding a report to the Tracker
6. Please report your PHP environment (i.e. Apache/PHP versions, whether register_globals is ON or OFF, OS, etc...)
7. Please use English when reporting

Some closing advice. If you get a blank page, please try this little hack first to get an error.
1. Edit the /include/common.php and modify lines 105-107 (or find the equivalent if you've changed something) from:

if ($xoopsConfig['debug_mode'] == 1) {
error_reporting(E_ALL);
}
to:
//if ($xoopsConfig['debug_mode'] == 1) {
error_reporting(E_ALL);
//}

Then edit copy and paste any errors into the report.
Good luck,
XOOPS Team