It's not just in Mass Effect either, I'm getting them in Fallout as well. Pretty much anything with custom character creation. Significantly, ME is completely un-modded, and that's why it weirds me out.
looks like a driver issue. update to the latest 1s for your gfx. if you are using the latest then try some older 1s
also when you ask a question like this please post your specs... it helps us give your better advice.