Valve's latest June changes to the Source engine broke a number of
plugins, including EventScripts.
Yesterday I released an Orange Box refresh via build 370 (links here):
http://forums.eventscripts.com/viewtopic.php?p=383836#p383836
Due to the need to get this build out quickly, it has not gone through
our normal private beta testing. Please report problems on the thread
above!
-Mattie