Fill Window / Centered Background Opera

I’m using the following code to fill a page with a centered background image.

My html:

[CODE]<div id=”bg”>
<img src=”images/bg.jpg” alt=””>
</div>[/CODE]

My Css:

[CODE]#bg {
position:fixed;
top:-50%;
left:-50%;
width:200%;
height:200%;
}
#bg img {
position:absolute;
top:0;
left:0;
right:0;
bottom:0;
margin:auto;
min-width:50%;
min-height:50%;
}[/CODE]

This works as I’d like in current browsers other than Opera.

Opera doesn’t position the image at center.

Can someone provide me with a fix?

My site: [url]http://www.robindean.com/[/url] – try it in FF then Opera to see the difference in bg position.

Also in #CSS _↴