Overlapping windows

Hi,

When I use QWorkspace I watch it:

Attachment 9470

and with QMdiArea:

Attachment 9471

Is it the bug or my mistake?

Thank you!

QWorkspace is obsolete, is it really worth your time to investigate it?

No :) I like QMdiArea. It's just interesting :) maybe I made ​​a mistake... but it's not a very urgent question :) I will use QMdiArea.