In evaluating the new 6.2 Beta2 code I found a minor issue.  To arrive at it I performed the following steps:

1.I created a new page to place the social groups module on

2. Added Social Groups Module

3. Created a New Social Group

4. Logged in with a normal User

5. Clicked 'Join Group' button as the normal user.

At first this appeared to not work, as the page did not perform a post-back, nor did it give any kind of indication that I'd been joined successfully.  However, upon going to antoher page and coming back, the 'Join Group' button was gone, the members number for the group was now 1 higher, and the user was a member of the group.  So untimately, the button did it's job. 

However, from a user perspective, if the button doesn't automatically hide upon successful execution of the command, or the page doesn't perform a post-back, and provide a "success in joining group x" type message, they may sit there and just keep clicking the button, and getting frustrated.  And who knows what other issues repeatedly trying to join the same group could cause. 

Make it a great day!

D-Man