hi there i have noticed that recently the forums has been going down quite alot and it seems to be like a problem that my friends forum of which i was able to resolve by increasing the amount of memory that php uses.

i have had a look at your configuration file at http://www.ubuntuforums.org/info.php owhich i noticed you ahve only got 64Mb set to it. In my experience a forum that is under heavy traffic like this forum tends to need at least 256M to ensure no crashes

dont know weather you ahve considered it or you have tred it already but thought id just mention it insted!