Can't make transparency work with white

I have a related question. I've noticed that white text on a dark background doesn't appear as crisp as dark text on a white background. The cause appears to be that the text has some extra "stuff" around the edges that makes it look great with black text on white, but which makes it look less clear with white text on black. Another latex site I visited had something they called "aliasing" that you could turn on and off, and it seemed to make the text look better when it was white text on black. Does your Latex have something similar?

--Percy