You probably got an unstable connection. We can't do much now if you keep getting banned. There are plans to change the anti-cheat a bit.. but it'll take a few weeks until we start changing it.
It always does. Fact is, the testing capability of the community > Valve's testing department. Guess these issues will be fixed the coming days. Fact is, that Valve always manages to break stuff with updates.
Removed bear attack. It's the only one that needs a removal, in my opinion. @ TheSecondWave: The jetpack itself didnt work anymore thanks to the update. Edit: Added new maps, removed a couple too. Current map list: