A lot of folks have been PM'ing me and asking me via steam chat so I figured I would drop a line here.

The current update has an issue with player_disconnect.  In the past this would have been fixed pretty swiftly by SM however due to a missing dll file there are no mdmp (crash dumps) being created and thus no code to debug. 

This is an issue with the engine itself and not something you can adjust for currently.  NFO recently released a statement regarding the issue as well:

We've received numerous crash reports following the last update to CS:S, even on vanilla servers, and are trying to track down the bug in the game that is leading to them (which might also be triggered by an exploit). Valve tells us that a support dll was forgotten during shipping, so no crash dumps are being created, and this is slowing down down this process.

There should be a CS:S update very soon to address the missing dll (and hopefully the crashes, as well). Please bear with us as we wait for Valve .

So lets hope they address it soon.  There is also a report on the bug side at the steam forums as well as a Server Crash thread that has been bumped quite a few times.