OK. I've run into very similar problems in the past as well, with some skins and fonts. I'm not sure what the solution to this problem is. It might have to do with shadows on some fonts.
As I remember it, NightTrain (Master Skinner) was giving advice to a person with similar problems in THIS THREAD.
It has to do with Clear Type. I think you'd have to open the skin in SKS and change the font to Classic Colors.
You could also change your computer's fonts to 'standard' from Clear Type. Should turn the trick.
