In tactical combat when you open the unit detail screen of any unit the battle music changes according to the type of unit you check. That is nice and all, but when you exit the screen the music does not change back to the combat music, but to a regular strategic map tune. The heat of the battle is completely lost in the sound.
This bug has been around for quite some time now (I think since Beta 3). I realize this is a purely cosmetic thing and nothing high on the priority list, but it is still an annoying bug that destroys the atmosphere during combat and I am sure there is an easy fix for that.