This is with mozilla-0.7 Go to http://news.gnome.org Click on Read More for any of the stories. Click Reload(on the mozilla toolbar). The image on the bottom of this page will flash. Mozilla will use 100% cpu time. Also Mozilla will keep asking and reasking for this image from the website(proxy in my case).
Dup of bug 52798 "gif img in table with width=100% blinks rapidly (flashes, flickers)" *** This bug has been marked as a duplicate of 52798 ***