Upgraded to 4.1.0 from 4.0.0 (just files and DB structure. duplicate remoteid check, updateniceurls)

Updated ezComponents and autoload arrays for EZOE which works now
Updated Apache to 2.2.10 PHP to 5.2.8

ERROR:
every content edit on both user and administration interface results in unexpected user logout.
The edited object is stored as new version everything OK but user is logged out.

Site uses 4 languages

this patch doesnt help
http://issues.ez.no/IssueView.php?Id=14622&activeItem=14

Steps to reproduce

Edit any contentobject logged in as any user
Click "Send for publishing"
User is logged out