Hey Rflint, something has changed the color of the active track in the Track pane. It may have happened in the last week.
Select a track in the track pane to make it the active track. In the older themes the track is lighter (highlighted). Whereas in the latest theme it's actually darker and just slightly darker, so it's hard to even tell which is the active track.
I wonder if it has something to do with what you had to do to fix the Marker's View problem you fixed.
Thanks for all your great work on this theme