Come on, I can understand Sourceforge needs the Adsense revenue, but this is going too far. A huge 450 x 400 blue advertisement is blocking access to most download links on a Sourceforge download page, and there is no way to make it disappear, no [X] button in the top right or a “hide this” link.
The biggest square ads I can see in the Adsense overview page are 336 x 280 (“large rectangle”), so this must be some kind of special ad. It renders the page virtually useless. Drop it, already.
BTW: more flexible screwing, anyone?