I just tried it on this very message. If I am composing it under
MH-Letter mode in XEmacs, go to the end of the To: line and hit
return, I get the error message attached to this message, endlessly
repeated. If I hit Ctrl-g to interrupt it, it stops, but expands the
minibuffer to fill almost the whole window, displaying these error
messages in the *Warnings* buffer.
 From mike.kupfer(a)xemacs.org  Thu Dec  4 20:17:44 2008
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 From: Mike Kupfer <mike.kupfer(a)xemacs.org>
 To: Rick Baartman <baartman(a)lin12.triumf.ca>
 cc: XEmacs Beta <xemacs-beta(a)xemacs.org>
 Subject: Re: [Bug: 21.5-b28] mh-e 
 In-Reply-To: Your message of "Tue, 02 Dec 2008 13:49:58 PST."
              <200812022149.mB2LnwED005607(a)lin12.triumf.ca> 
 X-Mailer: MH-E 8.0.3; nmh 1.2; XEmacs 21.4 (patch 21)
 Date: Thu, 04 Dec 2008 20:17:39 -0800
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 >>>>> "Rick" == Rick Baartman <baartman(a)lin12.triumf.ca>
writes:
 
 Rick> If I try to edit the header, it goes into an infinite loop that
 Rick> completely buggers up the XEmacs window, repeatedly printing error
 Rick> messages like:
 
 Hmm, "try to edit the header" is awfully broad.  Can you give a short
 reproducible test case, something like "when I type text into the
 Subject line", or "when I add an Fcc header line after the To line"?
 
 Are the repeated error messages the
 
     Warning: error: (invalid-operation (Won't change only window))
 
 messages that appear further down in the bug report?
 
 thanks,
 mike
  
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