Re: Several serious problems

[Richard Stallman]

    Recently, a package called buffer-charset.el was posted to
    gnu.emacs-sources.  It uses the machinery of hi-lock to work, and it's
    wonderfully simple to use: you just do M-x
    show-buffer-charset-characters (or use `C-x w c' is hi-lock-mode is
    already active) and you're done.  You are asked what charset you want to
    highlight, and if you don't know you just press TAB and choose from the
    list.  The offending characters are highlighted.

This might be useful for some purposes, but it is not the right
interface to be a convenient solution to this particular problem.  The
user knows that the file can't be encoded in a certain coding system
but she does not know which character sets are the problem.