Tried just now (installed edgy a month or so ago but didn't dare using this feature yet) and it seems all is well: the going back to top of page and any form of serious unresponsiveness is gone. Tested with KDE 3.5.5, Firefox 2.0, and Mozilla 1.7.13.
-- firefox and kubuntu slide-show exit when background switching https://launchpad.net/bugs/29947 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs