A couple quick comments from my testing of RB 2011:

I can't seem to find anything wrong with the Track - Merge command in RB. It works the same way it always did with regard to merging MIDI tracks. When merging 2 MIDI tracks, MIDI is always what gets put onto the destination track. Only in a situation when merging a MIDI track and an Audio Track would it render the MIDI track to audio and put audio onto the target track.

The Comments Window in RB does remember the location it was in when re-launching it within the current session, or when re-launching the program after quitting. The most recent location is stored from the previous RB session, whether or not the comments window was visible at the time previous RB session was quit.

Jeff Yankauer