I mean, someone was insane enough to make a transparent icon subtitle patch (which I use, lol), so...
I never understood why people used those. It makes the icon captions harder to read depending on your background.
That's actually one of the things that annoys me about Windows 7. You can't turn off the transparent icon background. You can turn off drop shadows, but that doesn't bring back the solid background color.
There's at least one third party utility (that I know of) for this, but unfortunately, it doesn't work with Aero.