Glitchy scrolling in Safari?

Weirdness on iPad 2 in safari. On certain pages, like ilounge.com for example, I get random bouts of glitchy black bars at the top and bottom of the page if I scroll quickly...choppy black bar at the top if I scroll downward, and the opposite if I scroll up. Seems to happen on image heavy sites, not as much if at all on more text based sites like forums.

Problem goes away after I clear the cache but comes back.

Don't seem to recall this happening on iPad 1. Anyone else?