Yes, it seems that "OnDisconnect" issue and the last message from you, Moak, in the Mutella forum are somehow related. Am I right?

But in general, I must admit, RequestDisconnect() and OnDisconnect() pair is really missing bit in MFS's CAsyncSocket. It's great that you could spot it out so clearly. I faced something like this while ago, but could never actually realise the problem.

--Max

P.S.: to be continued when I have more time