it's about 99% likely its something i've forgotten to change when updating with the beta code. i'm also just taking the code for add and edit members functionality without any of the group stuff or other new features. (v tight deadline, no time to add new functionality now
) its probably a case of i haven't taken enough code, or i've switched something off that should be on. i can see that it works fine on your beta demo. i just don't know what controls the session name so if you can give an idea of where that process starts and ends, i can probably find the error.