Subject: bug#7273: 24.0.50; finally found what has been subtly corrupting my files over the years: C-. flyspell-auto-correct-word

From: Chong Yidong <[email-masked]>
Date: Sun, 24 Oct 2010 17:49:02 -0400

[email-masked] writes:

>>> P.S., what is the best way to disable C-.? global-(un)set-key?
>
> CY> should do the trick, once Flyspell is loaded.
>
> You will have to tell me what to put into .emacs.

Try this ---

(eval-after-load 'flyspell
  '(define-key flyspell-mode-map [(control ?\.)] nil))