mystery "you are editing" message

Frequently, but not always, I get a warning from MPro when I try to 
log in after my wife has finished one of her email sessions:

        Message from Messenger
     You are currently editing one or more messages.  Please 
     confirm that you wish to log out and abandon these edits.
        Cancel / Log out

I check with a "what windows are open?" utility -- has she iconized 
something or dragged it off-screen?  The list of windows shows nothing 
involving Email Edit and nothing else relevant.  So I go ahead and 
click "Log out".  So far have never had a complaint from her that any 
of her work has been lost.

What could be causing this message from Messenger?  It might be 
irrelevant, but she is a bit of a technophobe touch-typist and admits 
that she has "flying fingers" -- sometimes hits unintended keys 
(Ctrl-A as a prime example) -- but I haven't fathomed what flying 
finger might trigger this mystery.

It never happens the other way around -- ie, when she logs in after 
one of my email sessions.  We are the only two users.  (Iyonix 5.18 
with MPro 7.06; I think it happened on previous MPro versions too.)

-- 
Jim Nagel                        www.archivemag.co.uk

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