First off, I apologize for the long delay in responding to this thread.
A few more questions for you:
1. Are you multi-tasking while you sim? We've seen a bug where sometimes keystrokes in other applications cause the sim engine to stop (it thinks you told it to quit).
2. Do you see this in any game you create, or just one? If it's the latter, what is the setup of the game?
Thanks,
Steve