Try the default themes first, and see if that works.
Only the BuddyPress theme has the Member Profiles that I am having trouble with.
Hi,
I am using WordPress MU 2.7.1 . I have the same problem with user registration form. When a user sign up’s and enter his details in the form after the registration when the user login to the site then the only nick name is displayed and he has to fill all the information in the form again then the information is displayed in his profile.
Jatinder
Yes, I had this problem. I figured it could be a plug-in conflict as, like connorg said, the registration worked fine at the beginning. For me it was the Google Analytics plugin – I deactivated it and all works fine again!
Whenever you have issues with BuddyPress, the best course of action is to distill your setup down to the lowest common denominator. This means switching to the default BP themes (bphome and bpmember) that come with BuddyPress and deactivating all plugins except BP.
What happens then? If you do not have any more issues, then you know it has something to do with your custom theme, one of the plugins, or some combination.
You then start going back up the ladder one step at a time. Switch the default BP themes for your custom themes. Does the problem return? It not, then is has to do with your plugins. Activate one plugin at a time until the issue returns.