Last modified: 2011-03-13 18:05:41 UTC
pt-contris should become pt-contribs. See http://en.wikipedia.org/w/index.php?title=User:Slash/monobook.js&diff=0, where I had to fix it to get my contributions tag working. I marked it here, but I'm not really sure if this is just a mess-up specific to the en-wikipedia. If it is, someone should go around and see if the other wikis have the same problem.
i'm not sure if this is actually a typo, or just a strange choice of abbreviation, but it's well embedded in the code, so unless there's a reason to change it (other than people writing 'contribs' by accident), it's best not to.
=( Probably a typo.