Error while upgrading...

[Crazycat]

So, try to edit the install/upgrade.php file to add the short line I gave you at the beginning of the file (before the defines) or replace the existing "error_reporting" line if exists, and run the upgrade.
You'll have to do this for all the upgrades.

Remember to close your forum, save your database, deactivate all your plugins and revert all templates before do your upgrade cycles.