The Social Groups content display has very recently been changed to something that looks quite confusing, and frankly I consider it fubared.
Here’s an example with a screenshot from the Riddle Me This group.
It looks the same in Internet Explorer 7 and Firefox 3.
I would attach a screenshot here, but attachments are disabled in this forum!
So this screenshot has been posted somewhere else and linked into this post:
The avatars are now above a dividing line containing the username, and below that line is the message.
The display used to look more like forum posts, where it was easy to see which avatar and username belongs to which message.