5
I've since moved to a different webserver, reinstalled the newest version XOOPS and started off with newBB 2 (took me ages to move the forums, posts & topic in the database whie maintaining poster information, etc) instead of phpBB (i.e. no modded core files anymore) and still have the issue, so it must be something in the database. Any ideas?
New users can't use uploaded avatars either, so it's not just the users I moved in from the original phpBB/ezPortal system, or those who have registered since I've been running xoops.