Jittery Flash

[Champak]

When I have the body background image fixed like so:

body { 
background-image: url("/~XXXXXXX/images/grade2.gif");
background-repeat: repeat-x;
background-attachment: fixed; 
}

the flash gets jittery during scrolling. When I take the "fixed" off, everything moves smoothly. I've been to other sites and looked at their source where they have similar body background, and everyone who is "fixed" has the same issue on their websites....those who have flash.

Is there a fix or workaround for this?

Thanks.

[Champak]

Also note, it's fine in IE. It's terrible in NS(I'm going to assume the same for Firefox then), and in Opera it acts up when the flash is in a frame.