I just upgraded my firmware now.
However, during the period I had those crashes, I had lots of memory most of the time (usually >3GB). However, I did shoot some time lapses every now and then which may have filled it up until I unloaded and deleted all the images. I can wait to see if it does it again, and then record how much memory is free on the SD card, then let you know?
Is it an issue with the Canon side of things than the ML side? Like I said, none of the crashes bothered or affected me. Just off/battryout/batteryin/on worked each time.
Btw, I've got some issues with the motion detect in the latest build. It's same as some I mentioned before. If the sensing area is "large" it always takes pictures. And if the sensing area (at other sizes) is moved to the top or bottom, it always take pictures. I'll get a video together when I have time and post it, but those are the same symptoms I had that I posted in a previous video.