... for when you are doing a release. THey are only cosmetic.
1) Using the new vertical auto-scale tick box, sometimes the vertical scroll bar vanishes.
2) When restoring a session, the signature line doesn't show above the wave window. You need to click track and then wave again to get it back.
3) I can't reproduce this one but I have seen the "Hide Normalisation" option operate in reverse fashion. I think this may also be on a restore session.
The LAME popup window keeps stealing focus but I don't suppose you can control that.