Well, I just went and did it. While uploading a minor css change for the addition of a Twitter sidebar, I somehow managed to entirely delete my css file. And I've got no backup. So I guess you're stuck with this new style, "Blueberry Cheese Brownie", until I can find the time to rewrite the old one, which will likely not be exactly the same as it was. Sigh.
I like the new look, although it's a tad more difficult for me to read. Could be that I'm colorblind, but the black text was easier on the eyes to me.