If you open up a Windows Explorer window and browse to %appdata%\MayhemIntergalactic (which is equivalent to e.g. C:\Documents and Settings\YourUserName\Application Data\MayhemIntergalactic on Windows XP - note that Application Data is a hidden folder), do you see any log files? If you cause the crash you're describing and then open up the latest log file and look in it, is there anything interesting in there?
Here's exactly what the log includes:
Renderer startup took 418515 microseconds
Audio startup took 2244198 microseconds
And that's that.
Otherwise, I'm out of ideas without consulting a debug log. If you
send me an email, I'll get you a debugging version ASAP.
I will do that. Thanks for all your help, Chris. I greatly appreciate it!