Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:
Counter-Strike: Source

The radar display has been enhanced

de_train has received a High Dynamic Range (HDR) lighting treatment, as well as some bug fixes and layout tweaks

The player's eye height while crouching now matches their in-game player model eye position more closely

SourceTV now shows the weapon in first-person view

SourceTV supports the tv_transmitall command

Assorted exploit fixes