KDE error messages

[Rem P Roberti]

KDE loads and runs okay, although the Kontact mail program has become 
inop.  When I close KDE I get this message in the console window 
repeated about four times:

X Error: BadWindow (invalid Window parameter) 3
    Major opcode: 6
    Minor opcode: 0
    Resource id: 0x1e0000b

I have the feeling that these error codes might be related to the inop 
Kontact mail program, because every time that I try to run that program 
I get an error message telling me that it is already running in another 
display window.  Also it completely eats up the CPU, and I have to do a 
kill -9 to shut it down.

Rem