GUI app freezing completely

Hello all!

I have an application running where the user can set some look and
feels. On a few, when doing a click on a certain menu item the whole
app freezes completely.

The command behind that menu is executed fully (I debugged it), but
after it returns back into the calling code from the event dispatcher,
the window *freezes completely*. It must have something to do with the
look and feels, some simpler ones don't show the described behavior.

When issuing that command, I can only hear my hard disk doing
something shortly, then everything is frozen. I can't even close the
frame anymore. Repainting is gone.

Does anyone know how to debug something like that?

Karsten

PS: The action performed is simply sending a maybe 15 or 20 byte
string over a socket... there are no exceptions that occurr, no
unexecuted code...
.

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