I'm starting to think those non-freestore overflow errors I mentioned were unrelated and just coincidental.
I started up Autocad today, opened up Firefox to check the daily dilbert and various messages, and ... I get a error beep, while in Firefox, and see no error window. I Alt+Tab until one pops up and it was Autocad... it was a fatal error, unhandled exception at hnvw9=85gn5w4958 (gibberish to me, no actual words) ... I hadn't even opened a darn drawing!! Autocad had sat there idle for 10 minutes or so... I don't have autosave on, or any other auto-timed commands running. It was sitting there idle with Drawing1 open.
I close everything, open Acad, and open up Excel to do some other work... same thing!
While Autocad is closed, I also get a Microsoft Error, C++ Runtime Error with some other stuff (I have a HORRIBLE habit of closing error windows before REALLY reading what it is)
I leave autocad closed again, and then this pops up about 5-8 minutes later, while I'm tooling away in Excel.