I prefer inverted themes, but sometimes, they just don't play well with websites. More often then you might think. Normally I just use User Styles to correct them, but I feel like you guys deserve to know about the bug.
Anyway, the text on your site is white due to my inverted theme. I think that's a result of using the default text colour rather then specifying black.
Note the text I haven't highlighted is really hard to read.