Sully, I notice on one very popular thread now there are more replies than views. To reply, one has to view the thread right? the number of views must be the same or more, and the number of replies is almost always less because not everybody comments. The counter is broken. This is the first time I have seen this happen.
One more possibility is you have been hacked, but I don't see bot or SPAM replies at hand as normally would be the case were that the situation.