Using a Mac, I habitually use the cmd- keystroke to cycle through windows within an application. I've been doing this for years on every application, including Itunes. Recently, though, I've noticed that in Itunes, if I cycle to the Itunes Store window, cmd- stops working. I can’t get to another window without using the menu or just closing the Itunes Store window.
That’s exactly what I’m running on this machine. I just tried it with the equalizer window open and iTunes on the iTunes store, and it worked. What windows do you have open?
It happens no matter what combination I have open, but usually, it includes Itunes, Itunes Store, and one or more of the following open in separate windows: Podcasts, Movies, TV Shows, Downloads