I'm not sure this is a bug at all, and perhaps it's vaguely related to #357 (which is old: 4.2b2). The mixer on my horizontal panel looks different from everything else, as if it doesn't respect the same top and bottom margins as the rest of the icons. It seems within, say, two pixels of top and bottom while everything else (icons, spacers, clock, other bar-like indicators) has, I don't know, ten pixels clearance. Are my "word pictures" working out here? :)
Dupe of 2267, I think. I know this one was reported first, but 2267 has an attached fix (whether that fix is acceptable or not is unknown though).
Agreed. *** This bug has been marked as a duplicate of bug 2267 ***