Looks good. Nice work on the icons.
A few things you might want to look at:
You may have made your icons bigger than 16x16, so you get a little cropping in the address bar
There is also very little difference between disabled and active states in the navigation buttons
when the player bar spectro is on, the track times are partially overlaid
when using the floating edit screen, the white-on-white can be a bit (IMHO) hard on the eyes
maybe a 1 pixel light grey edge?
It's also very hard to see the ratings stars in the main panel
Looking forward to seeing your dark version