I'm still crashing when running in IM. It happened several times last night only displaying a message that says it's an overflow. Eventually I was able to restart in Safe Mode after which, of course, there were no more overflows.
Does anybody else get this error message where it only says it's an overflow instead of "run-time error" when you run a single instance in IM? If not, then maybe it has something to do with me running multiple instances. This seems like a long shot though because they should be completely different processes and shouldn't have anything to do with each other.