working on fixing Faded skin...
if toolbar is consolidated into one icon, when the icons/buttons are displayed the bg colour is taken from element id="Panel.Header.Default".
works fine if header bar and caption bar aren't to different, otherwise it's hard to find a bg colour that works fine for icons in caption/below caption bar.
even a problem in MusicBee3 default skin.

a caption bar override element for that background would be most helpful, please
EDIT:
was looking at some of the old elements and wondered if
element id="Panel.HeaderControl.Default
could be used to provide the alternate bg colour?