Submitting a reply to a post in Activity disappear!

WPMU 3.0.5
BP 1.2.7
BuddyPress Social Theme 1.2.2

I'm testing out the BuddyPress Social Theme and have noticed that when replying to a post in the Activity tab it seems to disappear but increments the Reply(#) button by 1 until the Activity page is reloaded. It seem to work ok using the default BP theme although its called messages not reply(#).

Have I missed a setting somewhere to make this work?