Let me start off by saying that 2.4 looks good from what I've seen so far and all the developers' work is appreciated.
Now, onto the bug. This has happened at least 4 times with the new 2.4 release (on DFF and green's). While playing (WinXP, SP2), keyboard movement input suddenly stops. I can still see other players moving around and can look around with the mouse. The function keys work and the chat key works, although the messages don't appear (just like when you have lag). Even when it seems to go back to normal and begins to display my messages, I still can't move at all. Reconnecting to the server fixes this, or if I wait long enough (about a minute), it sometimes kicks in again. Again, I can see everyone else moving around, capping flags, chatting, etc, so it's not just lag. It just seems to stop listening to the keyboard for movement input.
Can anyone else confirm that this is a bug? I don't think it's my hardware or my connection, but I'm not ruling them out as the source of the problem (although it seems very unlikely).