I am using http://css3pie.com to add CSS3 features (just border-radius and background gradients) to this site I'm building:
http://concept.freshbeat.co.uk/match...2011-02/0-dev/

However, the gradient backgrounds do not appear to be working in IE9. According to the CSS3 PIE website, the latest version adds support for IE9 gradients.

Has anyone else had this problem?

For example, I am styling the pink navigation bar like so:

#nav {
    behavior: url(./script/PIE-1.0beta5/PIE.htc);
    background: #fa3b90; /* Old browsers */
    background: -moz-linear-gradient(top, #fa3b90 0%, #c80468 100%); /* FF3.6+ */
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#fa3b90), color-stop(100%,#c80468)); /* Chrome,Safari4+ */
    background: -webkit-linear-gradient(top, #fa3b90 0%,#c80468 100%); /* Chrome10+,Safari5.1+ */
    background: -o-linear-gradient(top, #fa3b90 0%,#c80468 100%); /* Opera 11.10+ */
    background: -ms-linear-gradient(top, #fa3b90 0%,#c80468 100%); /* IE10+ */
    background: linear-gradient(top, #fa3b90 0%,#c80468 100%); /* W3C */
    -pie-background: linear-gradient(top, #fa3b90 0%,#c80468 100%); /* PIE */
    margin: 10px;
    border-radius: 10px;
    -moz-border-radius: 10px;
    float: left;
    width: 928px;
    padding-left: 10px;
    margin-bottom: 10px;
    border: #fa3b90 solid 1px;
}

have you added

behavior: url(/PIE.htc);

at the end of the css where the gradient is and added the pie files ?

*update.

I see you have it placed at the top. try moving it to the bottom