When you press the 'back' button, Mozilla returns to the previous page with that page scrolled to whatever position you left it at. On some web pages that use Java for navigation controls (such as wired.com) this results in the nav controls and/or ads to be displayed oddly. I have a screen shot that I will try to include that will explain better. If not, look for it at this URL: http://www.paton.com/rick/javaerror.jpg or http://www.paton.com/rick/javaerror.tiff Steps to reproduce: 1. Go to http://www.wired.com 2. Click on a story that has more than one page (most do) 3. Scroll to the bottom of the page and click on the page 2 link 4. Click on the back button 5. Marvel at the misplaced grey boxes.
Created attachment 97487 [details] Screen shot of display oddity This is a screen shot of the display bug. It can be reproduced easily on my system.
Those are IFRAMEs, so this is almost certainly a dup of bug 137982. *** This bug has been marked as a duplicate of 137982 ***