I'm running 2010.
It doesn't happen very often, but AutoCAD will crash maybe once every 15-20 times I edit or create MTEXT. It's really the only time AutoCAD gives me a crashing problem. To edit, I'll double-click the text body, it'll give me the little cursor in the MTEXT editor (but not flashing), but AutoCAD will just freeze for about 2 seconds, and then it closes and gives me the "report a problem" box to send to AutoDesk...but they seem to never fix anything.