Disclaimer: I've never run an hlds server, only srcds servers.
Is this happening on both the Windows and Linux versions of the server?
If this is a widespread problem, it'd be a good idea if someone who is having the problem report it on the
hlds mailing list or
email Alfred Reynolds directly and see if he can tell you what's going on.
Side note: Alfred Reynolds is responsible for all the recent hlds activity, including the March 5 and 6 crash fix updates.
Edit: It has occurred to me that the version issue may only happen on the Windows version because the Linux version is now one version newer due to the March 6th update (which didn't affect the Windows version).
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