Nope. Ads are that width. I get the impression a lot of users have CRT or non-widescreen monitors.
I didn't use the jump thing.My display is 1280x1084 and I have to scroll right to see the entire frame in normal forum view.However, as I type this reply, the ads are on the right and I don't have to scroll.
In this thread, the attachments push the Right Side content off-screen.