🚀 go-pugleaf

I now have a strange problem with minimizing windows
on my new desktop.
Notepad and MSPaint, f.e., minimize to a small rectangle
(with system menu) placed at the lower end of the work area.
When I minimize an IE window it completely disappears!!!

I checked with EnumWindows that it's actually still there,
minimized and visible, but GetWindowRect tells me that
its position is -32000, -32000.

After I have minimized IE for the first time all other programs
also disappear to -32000 when minimized. Thus my user would
loose every window that he/she minimizes then.

What could be wrong here?

In case I can't fix this I probably need to add a taskbar to my
custom shell and monitor the creation/destruction of windows.
But then I would have to take care that all programs consistently
minimize to my taskbar and don't show an extra small rectangle.

How can I do that or how does the default shell do it?

thanks for any idea!

Nick