Problem with opacity in IE8

Answer 1

I had the same issue. I did a lot of searching and reading and found IE8 doesn't use the css for opacity other browsers use. Here is my CSS that I used for IE8:

#loading-div-background {
    display:none;
    position:absolute;
    top:0;
    left:0;
    background:gray;
    width:100%;
    height:100%;
    /* Next 2 lines IE8 */
    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=75)";
    filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=75);
}

However, it still didn't work with position:fixed, but once I put in position:absolute it started working.