Updates to Team Fortress 2, Day of Defeat: Source and Half-Life 2: Deathmatch have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:
Source Engine Changes (TF2, DoD:S, HL2:DM)

• Fixed a client crash in the sound emitter

Team Fortress 2

• Fixed a dedicated server hang in bot pathfinding
• Fixed the tf_zombie entity crashing some servers