All the child windows should be set to modal so that the parent window
can't be moved on top of the child. If the parent window is on top of the child,
it looks like the application is not responding.
Actually, I meant to say that they need to be set to transient with
I'm working on this problem.
Fixed in 1.0.1-1.
Fix confirmed with redhat-config-samba-1.0.1-1.