If I just launch it and quit, it's fine, but if I've been running it for a few hours or a few days (I leave it running for days on end usually, not rebooting or quitting very often), when I quit Outlook, it almost always crashes (though it looks like it's quit just fine) and I get the Microsoft Error Reporting (I always send in the crash information).  I've rebuilt my database and Outlook otherwise works just fine, it's just that it bugs me that it keeps crashing when I choose quit (or rather press Cmd-Q).