Naw, they don't recreate their thumbnails correctly for different colors. They won't change the black lettering just because it doesn't work on a black shirt.
I've created one with yellow lettering, it should be better:
http://www.zazzle.com/product/235937681883985675
Hard to know how the burgundy will work on the dark. I brightened it a *little*
You guys ordering this before I even get one, make me nervous.