E484 when setting filetype

Whenever I do a set filetype=mason, or it is done from
any file in ~/.vim/ I get an error (translated by me from
Swedish, so the actual English wording may be different):

"Error detected while processing of Syntax Autocommands
E484: can't open file /usr/share/vim/vim71/syntax/mason.vim"

/usr/share/vim/vim71/ doesn't exist anymore on my machine,
but I don't get the error with other filetypes. The error
is not anywhere in ~/.vim/, as far as I can tell.

Doing ln -s /usr/share/vim/vim72/ /usr/share/vim/vim71/
"fixes" the problem, but I guess there is a proper way,
and a real error somewhere with something specifically
naming /usr/share/vim/vim71/ when it shouldn't.
How can I find out?

/BP 8^)>
--
Benct Philip Jonsson -- melroch atte melroch dotte se
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"C'est en vain que nos Josués littéraires crient
à la langue de s'arrêter; les langues ni le soleil
ne s'arrêtent plus. Le jour où elles se *fixent*,
c'est qu'elles meurent." (Victor Hugo)

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