9210 and select() crash

I have an app that randomly crashes on select(). It runs for days sometimes, but eventually it always hits a snag in the WaitMils() (or something like that - I was only able to fully trace it once) under select(). If I am running in the debugger, I can hit F8 (why is it F8 instead of the standard F5?) and it will continue without an issue.

Anyone else see this? Know of a solution?