Firefox rendering issue.

I’m on XFCE and xmonad at the moment, and I’ve broken KDE and don’t have time to fix it so can’t test that, so this may be specific to my set up.

But I’m having a weird issue in Firefox 3.5 in 11.2 in which sometimes when a new page loads, it seems particularly if I’m scrolling when it switches over, it will leave half the old page rendered. If I then scroll away from the part of the old page, and back again, it will have been replaced by the new page.

Is anyone else seeing this?