If you use suhosin in cpanel's easyapache you might run into issues where you can not post a large amount of variables to a php script. Form's may not pass all their variables.
Add into php.ini
suhosin.request.max_vars = 1024 suhosin.post.max_vars = 1024
http://www.vbulletin.com/forum/showthread.php?t=222268
