When the site is slow to load the style sheets often don't take effect right away. Is your connection slow? Does it clear itself up if you wait a bit?
I've seen this before as well on a slow connection, but it usually corrects itself with just a little patience.
Something just happened to Chess.com...every link just gets displayed in a vertical list on a blank white background. Also I can't see the board in any of my games. Could someone help please? Thanks!