well... seems pretty wierd but it happens. I´m trying to use PIE with bumpbox and PIE sometimes works... and others not.

made a simple flash button calling the bumpbox with some flash test content with PIE for the drop shadow.
here´s the link to the test page: http://www.icebird.biz/bumpbox
Try it and refresh a few times and check it out! :s
I already lost my mind with this, so... any help will be welcomed.

heres a piece of the css code:
#sb-wrapper-inner{
overflow:hidden;
height:100px;
-webkit-box-shadow: #666 10px 20px 10px;
-moz-box-shadow: #666 10px 20px 10px;
box-shadow: #666 10px 20px 10px;
behavior: url(http://www.icebird.biz/bumpbox/Java/PIE.php);
position:relative;
z-index:0;
}

already tried with url(http://www.icebird.biz/bumpbox/Java/PIE.htc); and the result is the same.