Linux Dedicated Server
* Improved connection logic to help servers that aren't automatically reconnecting to Steam.

Engine
* Fixed seeing error dialogs if the "-nocrashdialog" command line parameter is present.

Team Fortress 2
* Added an optional per-map particle manifest called <mapname>_particles.txt, which should be located in the maps directory, so map authors can load custom particle files.
* Fixed minicrits resulting in reduced damage for weapons at close ranges.
* Fixed the Cloak and Dagger not regenerating at the correct rate.
* Fixed setinfo exploit that allowed restricted convars to be set while connected to a server.
* Fixed tournament mode being interrupted if mp_timelimit hits before both stopwatch rounds have been played.
* Fixed "jointeam unassigned" exploit.
* Fixed being able to respawn during the chat time before a level change.
* Fixed "sensitivity" ConVar not capping the upper value which sometimes caused a server crash.
* Prevented some exploits based on mat_dxlevel being changed in-game.
* Updated ripple effects for water drips to improve performance

* Improved connection logic to help servers that aren't automatically reconnecting to Steam.

* Updated ripple effects for water drips to improve performance

But it's still broken since I have ~40-50 fps underwater in crysis with everything maxed out.