I am also experiencing this on my m3100. No bugs (yet) except I have to soft reset at least once a day because the whole thing just freezes up. Software I have installed is just the same as I had on old m500 which was ultra reliable. Think I had to soft reset that one maybe a couple of times in a year! Progress I guess.
I've also found mine hanging while in suspend mode, such that it won't turn on when I pick it up again. That's the most annoying, as I might have had a half-finished document in RAM at the time... It happens once every few days or so.
I am going to rebuild it, and slowly re-install the apps; hopefully I'll find any troublesome ones in the process. So far, Skype seems to be the worst offender.