October 13, 2011 Patch

Patch notes

Fixed an issue with the multi-threaded renderer which could cause a crash on map change
Adjusted whitespace to improve formatting in status command output
Changed stats output to show KB/s instead of bytes/sec, added a connections column, and changed the users column to "Map changes"
Fixed game servers not being able to execute the retry command due to the dependence on the connect command (which is not executable by game servers)
Made sndplaydelay executable by servers
Server frame rate is now based on the tickrate of the active Source mod, not the fps_max convar
Server processing delays have been reduced, especially for servers on modern Linux kernels
Entity processing logic has been optimized to significantly reduce CPU usage on full servers
Multi-threaded server code is now enabled by default under Linux (already enabled on Windows)
An exploit with non-printable characters causing lag on Windows servers has been fixed
CPU is fully yielded back to the system whenever the server is running faster than the tickrate
Dramatic increase in performance for low-level math libraries