This page places DIVs over an applet to show how poorly things are rendered when semi-transparent HTML objects are placed over Java.

#A, #B {
position: absolute;
top: 50px;
width: 120px;
height: 120px;
}
#A {
left: 10px;
background: green;
}
#B {
left: 100px;
background: red;
opacity: 0.5;
}

This also happens if the DIVs are given a high z-index, the applet given a low z-index (applet positioned normally or absolutely).

Unlike my previous report (https://bugzilla.mozilla.org/show_bug.cgi?id=478347) overflow: values seem to have no effect and the rendering of the solid DIV is as expected.

The applet is from the Sun website: http://java.sun.com/docs/books/tutorial/uiswing/components/applet.html