I did some fiddling: PPCT will develop the scroll bar below 807px wide (as of the USB Swiss army knife post). PPCT forums get it below 805px. DMT main page and forums get the scroll bar below 808px.
iPhone 4! ☠☠☠ Mid-2010 15" MacBook Pro! ☠☠☠ Gateway LT2102h! ☠☠☠ Dell XPS M1210!