I receive similar issue. I create 1000 messages in load test for topic by script (
http://77.221.154.162/as/LoadTopic_...orum.zip). Form "Reply To Topic" has loaded in 60sec! And there are lot of sql requests to database I fixed by SQL Profiler.
I do not understand what so much request to a database about the list of messages in same topic for open the form of the answer to one message.
I have asked support a week ago, but I haven't answer yet.
Thanks!