Comment 6 for bug 1171658

Still a problem? -
Well yes & no, noting this bug was 1st filed on 13.04
There is currently no way to get a fully transparent panel so the fact that opacity of the Background color affects how the panel looks is less relevant.
But yes, altering the Background color opacity does alter the appearance of the panel though in current compiz/unity that may be expected behavior
So in that vein & with a fully transparent panel not possible maybe this bug should be invalid.