Updates to the Source Engine have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:
Source Engine
Fixed a client crash
Fixed sv_allow_wait_commands restricting the server using wait
Fixed a crash in "soundlist" command
Reallowed fps_max value of 0, which means unrestricted fps
Fixed a crash playing back demo files recorded with the previously-released engine
Client forwards server commands it doesn't understand back to the server
sv_pure 1 now allows custom spray decals by default
