I cannot see the text on yahtzee's site either; that's because the stylesheet specifies that the text should be white on white O.o

I recommend you use the 'zap color' bookmarklet; it worked for me! just click on this link (or, better, drag and drop the link to a bookmark toolbar to use later).

Oh, dang, I guess it's probable that Dth will strip the javascript from this. Hm. In this case, you can find that bookmarklet over on that page. very useful for weirdly coded sites or garishly colored ones!