Progress Indicator z-index problem on IE 9

Hi,

I have a problem with the default progress indicator on Internet Explorer 9. The problem is this: I open a new window on a vaadin 6 application and I load some data from the server. If this loading takes too long there is a progress indicator. When I use firefox the indicator is shown on the top of the window but when I use IE 9 it is under the window.
I set the z-index in css for the progress indicator to be 30.000 and 10.000 for the window, for both components I set position: fixed.

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