I'm new to the forums here, though I've read through several threads on this topic because I'm rather unhappy with the new site design myself.
Frankly, I like the design of the header, but not the colors, as several others have stated... I don't think NEW colors need to be found, so much as simply toning down the neon orange and blue. Possibly something closer to the colors used in the firefox logo, a much more natural orange and a deeper blue, would help keep it from being an eyesore. Then, of course, matching the rest of the orange text on the page to the header.
I think it's a huge step forward compared to the tan and brown design that was up for the last couple months, but the colors just need some tweaking.