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After Upgrading Joomla to 3.3.0 Jomsocial 3.2.0.3 gets error 500
First upgraded Jomsocial to 3.2.0.3, then Joomla to 3.3.0 as you suggest.
Now my Communitysite gets error 500 Unable to load format class.
I found out, that any other site like infos, downloads etc works if i typoe in the url directly. Now i have switched one of these sites as my mainpage and then the whole site works, except Jomsocial. If i click onto the link "Community" which should start Jomsocial, i get the error. Switching to Joomla standard template does not help.
My admin userid has changed from 62 to 10! ??? Changed back in DB table _users and _user_usergroup_map.
I found out, that all users which are member of the Joomla group "Vorstand" has this problem. removing them from the group solves the problem. Adding them to the group, problem again.
Ok... found the problem... It was a enabled XIUS Searchbox module which only users of the group "Vorstand" has access to. Disabling the searchbox solves the problem...