> The host window is on the back.
> If I pass null I get an Illegal Argument Exception.
> Tell me there is a solution...

You are building Pivot from trunk, right? Try commenting out the check for 
owner == null. Let me know how that goes.

> By the way, why does the function createDisplay() needs an AWT Window? we
> are all using pivot Windows...

As I mentioned earlier, all Pivot windows live in an instance of Display that 
is hosted by a single native window (or applet), and are constrained to the 
bounds of that display. The createDisplay() method creates another Display (and 
corresponding native host window) on which Pivot windows can be opened. That 
native (AWT) window may or may not need a parent. It depends on the needs of 
your application.

> and why does it need a parent window at all?

It probably doesn't. I think the null check is invalid. Let me know what you 
find out.

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