Well check my log for example:
None of those kicks were made because of any hack\exploit\cheat. Only the last one is because I have the ultimate server mod on system folder which I'm even trying to load offline and No idea what's it's class name.
ps: lots of ppl are having those kicks too.
That covers more than 1 month time worth, and mostly it's just about Punkbuster not being able to communicate correctly with your client (due to your connection, likely). The "Ignoring MD5 tool queries" it's hardly useful, it doesn't tell anything of the issue that caused a lack of communication between the server and the client.
Btw if you meant about that Slot Closed warning, well it's just a client/connection fault, it used to happen before and it will still happen under the new name. It happens sometime that a game server goes totally nuts, because it needs maintainance, or it just needs to be restarted, and you see players getting kicked one after another, because the server itself is no more communicating and operating at the level it should for Punkbuster to work "flawlessly" (let's say)...but that is pretty obvious when it happens, as it soon leads to a server crash.