Updates to Team Fortress 2 have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:

Team Fortress 2

* Updated versions of CP_Dustbowl, CP_Badlands, and CTF_Well with several exploit fixes
* Fixed Linux build not handling FCVAR_REPLICATED and FCVAR_NOTIFY cvars correctly
* Plugged an exploit where the server could send executable code to the client
* Fix client crash on exit while processing game stats
* Updated the Stats Summary screen to remember your previous selections each time you open the menu and while changing levels
* Added mp_stalemate_at_timelimit ConVar for server admin to allow SuddenDeath when mp_timelimit hits on non-Valve maps
* Updated CTF mode to remember the player who stole the intelligence from the enemy base and reward that player if the flag is captured by someone else

* Replace underscores in map names with spaces so custom maps with names like cp_gravel_pit will show as "GRAVEL PIT"
* Hitting F4 while the tournament mode "Ready" countdown is active won't automatically set a team to "Not Ready"
* Fixed auto-screenshots not being taken at the end of the map during tournament mode
* Fixed gates being closed during the pre-round time during tournament mode
* Fixed GetDynamicBaseline crash
* Fixed rare animation triggered sound crash

Source.