As I explained in the other thread...
We Have Widened The Forums/Bigger Photos
Some of you expressed frustration with the fact that the forums were a little narrower than the old ones because of the skyscraper ad we had on the right side. Therefore, we removed that ad and replaced it with a Leaderboard ad that appears after the first post. That way, we're still able to run the ad, but you get use of the full width of the screen. This will also allow us to increase the maximum photo width allowed to 900 pixels.
Keep the suggestions coming and we'll keep tweaking to make things better!