XF 1.1 User Preferences Not Saving

[Strong]

Sorry for the newb question, I did several searches and came up empty.

My forums have an issue with user preferences not saving. For example, my users cannot change their alert settings, time zone etc etc...

I'm not even sure where to begin to look for a fix..

 

[Strong]

Oh wow.. Just had to look at VERY recent threads.
http://xenforo.com/community/threads/user-cant-change-time-zones.43933/

Credit system is killing user preferences...