I finally managed to have a better filetype detection for Perl from vim.
Here's my new ~/.vim/filetype.vim file :
if exists("did_load_filetypes")
finish
endif
function
augroup filetypedetect
au BufNewFile,BufRead * call
Additionally, to help me editing pods, I have this single line in ~/.vim/ftplugin/pod.vim :
set tw=74