Bug with animate background-position on IE8

[[email protected]…]

Code animate

$('.pub-images').animate({
  backgroundPosition: '-' + (this.pageWidth * page) + 'px 0' //Example : 450 * 2
},
this.pageSlideTime * ((this.pageActive > page) ? this.pageActive - page : page - this.pageActive), //Example : 500 * 2
function() {			
  //Active page marker
  mi.pub.pageActive = page;
});

IE8 report

Agent utilisateur : Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C)
Horodateur : Wed, 12 Jan 2011 09:56:06 UTC

Message : Argument non valide.
Ligne : 6775
Caractère : 5
Code : 0
URI : http://127.0.0.1/**************/js/jquery.js?version=20101216155024

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Work on FF, Chrome and Safari !

[jitter]

Thanks for taking the time to contribute to the jQuery project by writing a bug report.

In short: jQuery doesn't support animating the background-position property. For a more in depth answer please check my comment on the ticket referenced below.

[jitter]

Duplicate of #7755.