BG images rendering problem in IE

Question

I have multiple background images (all of my images are either in jpg or gif format) in my website and it renders smoothly in firefox, but some of those images doesn't render in IE and when I scroll through the page some of the images renders and then disappears again. This implies with css sprites too.

Answer 1

Do the HTML and CSS code validate?

Answer 2

This might be the Peek-a-boo bug.

http://www.positioniseverything.net/explorer/peekaboo.html