Firefox Scroll Lag - background repeat issue?

Hi guys,
I modified my css body code (for a forum) to look like such:

body {
	background: #000 url(http://avatarprime.net/public/style_images/avatarprime/custombg.jpg) repeat-y center fixed;
	color: #fff;
	font: normal 9pt arial, verdana, tahoma, sans-serif;
	position: relative;
}

Code (markup):

However it appears with the addition of

background: #000 url(http://avatarprime.net/public/style_images/avatarprime/custombg.jpg) repeat-y center fixed;

Code (markup):

, it causes scrolling lag for those who use firefox. Is there something wrong with my css code? Without the background repeat, the theme is fine, and scrolls without any minor lag.


Cheers.

 

You're adding a second background image? There is no such thing in CSS2.1

 

No perhaps I wasn't clear. I have one background image and want it to be fixed. However it seems to lag in firefox everytime I use that body code I posted above.

 

Only Firefox is effected? If so, what versions are reporting a problem?

Does Chrome not run into this problem? Have you tried defaulting your Firefox settings and turn off any addons, etc?

 

There is a very slight delay in Google Chrome and Internet Explorer. However, firefox is the one that is most affected. I have tried a vanilla install of firefox and still the same issue. It's not just me who's experiencing it too, some of my members reported it.