If you use Firefox and have a flickering when scrolling that is a css position fixed for this is not an uncommon thing as many users have the same problem. So state that is can flicker so bad that at times it can hurt their eyes to look at the monitor. This bug has been reported and has been fixed if you are using Firefox 3.5. The actual fix was made with the major update to the Firefox 4.0.
. Once you update to the newest version it will fix the problem. For more information on this query you can visit this trusted site http://blog.ginchen.de/en/2009/07/23/position-fixed-flackert-beim-scrollen-in-firefox-3-5/.
