Reuben Thomas <rrt@sc3d.org> writes:

> 1. Rename my ~/.hunspell_en_GB.
>
> 2. Start "emacs -Q"
>
> 3. M-x flyspell-mode RET
>
> 4. M-x customize-variable RET ispell-program-name RET; set to "/usr/bin/hunspell"
> (doing this after step 3 because the variable is not available for customization
> before loading ispell)
>
> 5. Type "etc. i.e. e.g."
>
> All of the above is now red-underwiggled.

Easier reproduction case:

----
(setq ispell-program-name "/usr/bin/hunspell")
(ispell-change-dictionary "en_GB")
(flyspell-mode)

etc.
----