I just went back into iPhoto 6.04 and tried it again. This time I forced a resizing of the music selection window. After I did so, the individual track window re-appeared, though it was gone. Now I can't make it go away, so that is good. It appears that installation of iTunes 7 caused a re-draw of the selector window, as I had just made song modifications prior to installation of iTunes 7. When I went back into iPhoto after perusing the new iTunes GUI, I could no longer add/select songs. Maybe it just happened on my MacBook Pro, but it DID happen!
Mac Hammer