Using any character rig (Even the one which ships with Motion Builder Mia...)
Add some mo-cap to the rig in Story mode
Play around with a couple of layers and then export or plot the animation so it can be used in normal mode (As a take)
Now if you work with a couple of layers example an additive for the body and an overide to lock a foot placement. It will crash without fail at some point. To be specific, as long as these steps have taken place, MB will crash for sure.
- Possible things which I could think would be making this happen are that MB is plotting something during story mode which is building up to the crash later on.
- Story mode is just not finished and is not working as it should yet
(But as I mentioned previously, this bug can be repeated in 2011 also)
What could possibly be making this crash, I really don't think this should be happerning using the official shipped Character (Mia)