I'm running with a fairly standard kde plasma desktop - so the bit
above the menu bar is all missing (and the left hand frame is the
faulty one)


 > And what happens when you maximize the
 > frame and restore its normal size immediately afterwards?
 > 

Ah now that's interesting! When I maximize - selecting the relevant
frame in the toolbar and using that popup WM menu option (I've also
tried using M-<f10> and get the same result) the frame moves to the
top left of the screen but *doesn't* maximise it remains (AFAICT)
the same size and the minibuffer now disappears! With no minibuffer I
then get

#<window 4 on  *Minibuf-1*>

for the frame parameter. When I take off maximisation the minibuffer
is restored - but still no window decorations.  Is this a kde/plasma
bug - or maybe a gtk/plasma bug?

Robert
-- 
Robert Marshall