Where does the clip on my DialogBox come from?

I have a DialogBox that works well, but now I'm trying to add a drop shadow to it.  I can get it, except that the element.style on the div that gets created has "clip: rect(auto auto auto auto)" in it.  It I delete that, the drop shadow shows, but with it the drop shadow is invisible.

I can't figure out where it is coming from.  I am quite sure that there is nothing in my code that sets this property, so I'm guessing it must be in GWT, but I can't find it there, either.  Or is my browser imposing it on me.

The clip is set on the element.style, not on any css class or other selector.  I don't understand how it got there.

Anyone know where it comes from and how to get rid of it?

Thanks,

Michael

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