So I just looked at the syntax file linked by Antoine and that is definitely *not* what he meant to link to; probably meant http://www.vim.org/scripts/script.php?script_id=790 . As for the indentation file, it's out-of-date and so doesn't support 'with' statements (looks like people have already started to fork it: http://www.vim.org/scripts/script.php?script_id=3003).

At this point I'm willing to either hand maintenance of the files over to someone else or to delete the files and shift what we point people at.