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I've just started getting this error with emacs on my Macbook Pro:

Ispell and its process have different character maps

I've tried changing my character map to utf-8. No luck. It would be nice if it told me how they were different and what to do about it. Any thoughts?

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If the coding of the buffer is not specified, EMACS attempts to determining automatically. This causes a problem if the buffer contains a UTF-8 or Latin1 character and the subprocess is determined to be sending up ASCII.

I have solved the problem by placing this line as the first line of my .tex files:

% -*-mode: LaTeX; coding: us-ascii;-*-                                                             
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