Moose perl.vim at http://www.vim.org/scripts/script.php?script_id=2526

[Greg Matheson]

I'm happy with the support for Moose keywords with this syntax
file, but I'm not so happy with the letting of the
perl_include_pod var. It was there, but not let in the
original 7.2 perl.vim.

I like all my POD to be a uniform light blue, but with 'let
perl_include_pod=1', the first and last lines get highlighted
with a bright red and yellow that is distracting.

Turning this off with
'unlet perl_include_pod' or 'let perl_include_pod=0' in
/usr/local/share/vim/vimfiles/after/syntax/perl.vim, the proper
way to make adjustments, rather than editing the original files,
only seems to have an effect on files opened after the first
file.

That is, the first file has the distracting highlighting of lines
starting with POD keywords.