Re: "Text is read-only"... except it isn't... or shouldn't be

[ken]

n 05/13/2013 12:51 PM ken wrote:
> > > Date: Mon, 13 May 2013 05:47:46 -0400
> > > From: ken <gebser@mousecar.com>
> > >
> > > A file which I've been opening in emacs and editing for a few years in
> > > emacs suddenly with emacs version 22.1.1 became read-only.  I open it,
> > > can navigate around in it (though the cursor/mark isn't visible), but
> > > when I try to edit it, I'm not allowed.  I get a message in the
> > > minibuffer saying, "Text is read-only".  The beginning of the modeline
> > > is "-u: --".  I can open this same file in vi and edit it (as the same
> > > user) without any problem at all.  I don't have this problem with any
> > > other file I edit in emacs, just this one.  The OS is linux, kernel
> > > version 2.6.18.384, and the permissions for this file are 664 and I am
> > > the owner of the file.  If I change (i.e., mv) the name of the file to
> > > something else, emacs behaves normally and lets me edit the file just
> > > like any other file.  So I'm pretty sure that the problem is that emacs
> > > has a problem with the file name and thinks I shouldn't be allowed to
> > > edit it.  How do I turn this behavior off?
> >
> > What does Emacs say if you type this:
> >
> >    M-: major-mode RET
> >
> > in the buffer that visits this file you aren't allowed to edit?
>
> image-mode

If I do "M-x text-mode", it's still not possible to edit the file... I 
still get the message "Text is read-only".