Last modified: 2011-08-19 19:12:24 UTC
There is class="mw-redirect" missing in redirect links listed by <categorytree>. Normally, redirect links anywhere on page (even in messages) have such class, however not those generated by <categorytree>.
Probably similar to this issue for image links (bug 23204). Those are created using the "known" and "noclasses" markers.
Unassigning default assignments. http://article.gmane.org/gmane.science.linguistics.wikipedia.technical/54734