• Fixed a medic invuln exploit.
• Fixed grenades going through players or buildings.
• Fixed exploit with rockets causing damage through thin walls.
• Fixed exploit allowing snipers to fire faster than intended.
• Fixed exploit allowing players to teleport with the intelligence.
• Fixed exploit attaching sappers to buildings through walls.
• Fixed spy backstab exploit.
• Fixed spy being able to attack without dropping his disguise.
• Medics no longer heal enemy spies when they're not disguised.
• Tweaked autobalance calculations.
• When an engineer dies in sudden death, his buildings explode.
• Fixed stats sometimes not reporting correctly.
• Added a dialog to indicate when the host shuts down the server.
• Added rumble to TF weapons.
• Fixed ping column sometimes getting hidden in some resolutions.
• Added 10 and 14 player game sizes.
• Prevent hosts selecting game sizes above their bandwidth limits.
• Improved handling of large network packets to eliminate bandwidth spikes.
• Reduced respawn times for smaller games.

Via Steam Users Forums