Sonu:
I don't KNOW why, but I can guess:
All the thread on the first page were thread from the General discussion forum, most of them being only slightly or not at all related to programming. As CodeGuru is still a programming site, I suppose Brad decided to remove either the threads not related to programming or the whole General discussion forum from the main page.
It seems fair enough to me.
Another possibility is that the hot thread section count the number of answers "in the last" something. As this thread has become more quiet recently, it might be the reason why it's out.
By the way, have you read all you had missed?
