Forum Group Invitation, no decline / remove option???
 

I'm having an issue where users can't deny group invitations... there is a join button, but no decline or remove option. Thus, it remains in their inbox indefinitely. Is there any way to fix this?

http://img8.imageshack.us/img8/2271/invitationts.jpg

and

http://img8.imageshack.us/img8/2271/invitationts.jpg

I disabled plugins, to determine this isn't a plugin issue. I have also set up a default vb4 theme, in which I have had no luck either. Any help would be greatly appreciated!!