No, it's not you. I forgot that CM has given abilities to group owners & admins to hide that menu. In this case, go to the group home. Just below the group banner, there are 3 blue links..."let's talk", "photos" & "more". Hover over the more & a menu will drop down. This is where you will find the "leave group" link. Sorry about that. I forgot they had made that change.
at 2:38 PM on May. 8, 2011