A profile changing bug using volume keys has been fixed. In previous firmwares the ringing profile that was changed using volume keys seemed to be independent and didn't notice if 3rd party applications changed it.

So for example, a common scenario for me was that I had used volume keys to put phone to silent from ringing, and then RingingRestorer returned it to ringing after 15 minutes. Now next time I tried to use volume keys to put it again to silent, it wouldn't work because it thought it's in silent mode still. Now in PR1.3 it works correctly.