Valve has release a update today and it includes the change to the network code, added sv_pure, fixed terrain collision and fixed a causing delays.

The Full List:

- Changed some networking code to help alleviate the lagouts some clients are experiencing
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- Added sv_pure to the server, currently defaults to off. Type “sv_pure” in the console to get the full description
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- Added DoAskConnect command to serverplugin sample
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- Added server log entries for: Round_Start, Round_Setup_Begin, Round_Setup_End, Round_Overtime, Round_SuddenDeath, Round_Stalemate, Round_Win, Round_Length, Mini_Round_Selected, Mini_Round_Start, Mini_Round_Win, and Mini_Round_Length
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- Server log entries for Round_Win and level changes will now detail the team scores and player counts
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- Updated server log entries for flag captures to detail the number of captures and the tf_flag_caps_per_round value
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- Removed some legacy math convars for turning off SSE/MMX
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- Fixed terrain collision bug that allowed players to get under the terrain in some maps
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- Fixed jump/taunt exploit
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- Fixed Windows dedicated server running in -console mode moves its window to the front instead of the back upon startup
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- Fixed Windows dedicated server bug (in -console mode) where typing anything in the console window was slow and tedious
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- Fixed an error when updating name of 32nd player on server
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- Fixed extra ascii 0×01 character at the beginning of ” connected” console spew
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- Fixed a bug that could cause a slight delay on engine startup