It seems that there were more problems with the new TF2 update than we thought. Besides having server-crashing commands and a command to immediately unlock all the achievements, there have apparently been a number of client crash issues and infinite ÜberCharge exploits. No longer! They have no been patched. Here's hoping that more exploits haven't been opened or are lurking around the corner.

On a related note, if you haven't, check out the new Gold Rush/Medic update for TF2. It's amazingly well put together, and shows the sort of dedication Valve has to making and updating great games. If only all developers were this generous to their customers.