The error message can be reproduced like this:

    mfabian@ari:~
    $ echo "test" | hunspell -d nn_NO -a
    @(#) International Ispell Version 3.2.06 (but really Hunspell 1.3.2)
    warning: line 190: incompatible stripping characters and condition
    warning: line 409: incompatible stripping characters and condition
    warning: line 410: incompatible stripping characters and condition
    *

    mfabian@ari:~
    $ 

There seems to be something wrong with the Nynorsk Hunspell dictionary.

    mfabian@ari:~
    $ rpm -qf /usr/share/myspell/nn_*
    hunspell-nn-2.0.10-11.fc18.noarch
    hunspell-nn-2.0.10-11.fc18.noarch
    mfabian@ari:~
    $