This is a pretty convincing demonstration that it's a fake

"Ok I stayed up thirty minutes longer than I had wanted. I am 100% sure this is a fake and that the_earth, Searingshow, Babykrune, and Dr4goN (From SCWire) are in on it. This could provide evidence that some of these accounts are alts of each other. I can also tell you that it was faked using image editing and not through html/css.

To see why, you must understand a little bit about how the background for this page is generated and how it fits inside the boxes that contain the forum categories. The background is one image, approx 200x200 that has all the elements this background needs. Using css, they slice it up to create sub images of the little doodads you see along the borders. These are exactly the same image, repeated along the borders at a precise pixel interval.

Now, these boxes with the forums are on a separate layer and contain no background at all. The borders are made of four dom elements, one for each side. On the inside of these, you will see the background shown through because there is nothing on the layer above them to need its own background.

Proof 1) Measure the distance between the doodad on the right with 3 (and a small faint one on top to make 4) horizontal lines. It appears every 1.5 inches or so (depending on screen size). On the provided screenshot, it appears again on the added box, exactly the same way it appears from the third forum in the D2 section.
2) Now also notice that below that, there is a larger gap than usual to the next three line doodad. This is due to stretching the image vertically at that insertion point.

If you would like to see how the borders really change when you add or remove one of these elements, download firebug, go to the forum page and open firebug with the inspect tool. Click on a box, then in the firebug panel below delete one of the divs associated with a sub forum box. You can always do the same thing with the css on the right of the panel and increase the size, to see how they get shifted down. It does not match the behavior shown in the screenshot. "

http://forums.battle.net/thread.html?topicId=18031132994&postId=180294904390&sid=3000#34