The Now Playing strip along the top gets a little cut off as well. Making that a few more pixels wider would be friendly to my fingers.
I ran into a bug on your latest version today. The Previous control button stays gray after it is pressed to return to the beginning of a song. It doesn't do that if you go to the previous song, only if you go back to the beginning of the current song. This is consistently repeatable for me. Pressing Pause/Play does not return it to the proper color. Pressing the Next control to go to the next song returns it to the proper color and it changes when the current song ends and the new one begins. I'm attaching a screen shot.
The screen order during animation seems to work OK for me. I haven't had the wrong screen come to the front during my limited use thus far. I haven't had a chance to test rearranging the buttons, yet.
Finally, I'm not real crazy about filling the timeline scrubber behind the scroll thumb. I like the wide scrubber, but I prefer it unfilled. The white doesn't look right with all the rest of the darker colors. That's just me, though.
I like the new stuff you've put in. I really like having the shuffle control in the Now Playing strip. The visualizer system is really nice, and the visual theme adjustments are coming along well. Thanks.