I'm not sure if I'm the only one that voted here, but that looks funny. I like the overall site format. Its fucking fantastic! Just the layout, is great. ~ But, going from black to white: is like turning on the lights in a dark room, and finding a legion of giant rats (being us) with giant yellow eyes, trying to get used to the light. I think white is alright, I just can't use it much, at night.
The contrast of white text on a black background is better for your eyes on backlit displays. This is even why the tablet version of Amazon's Kindle app allows that for a reading mode.
Unless you're reading on some sort of future transparent and/or e-ink display, the White Site will slowly kill your eyes. However, if you enjoy it more, then use it. Don't worry about what others feel.