I understand the reason for ads. But can you please move them around a bit so that they do not take up so much room on the left hand side of the screen while reading (inside of) a post? After the first two or three posts inside of a thread there are no more ads and it's just empty space. It's visually unappealing.
It messes with the feng shui of the forum.
Maybe they could go on the top or on bottom of the post pages? Or maybe you could have them show up everywhere except on the pages that are inside of the posts themselves? Or maybe you could have the posts inside of a thread wrap around the ads so that everything squared back up to the left-hand side of the screen once the ads are displayed?