I can confirm that the problem exists. Doesn't seem to be a problem if saved manually, and I'm not sure it always is on autosave (my test docs seemed to be still there). Maybe it is an issue only with open docs or with docs that are open in their own window.
Lost some stuff on the last crash which had been there for over 12 hours.
I've not experienced any autosave problems with other programs.
The 'crashes' are of the system freezing and having to be restarted.