cloudhead/less.js — pull request #870 by ahem (2012-07-17 10:26:11+00:00)
Title: Fix to #396 (Utf-8 class names are not supported)

I made a small change to the regex in element in the parser to make it allow UTF-8 characters in classnames. Basically it allows any character that is above \x80, which is what I believe is the correct behavior.