http://code.google.com/p/html5lib/issues/detail?id=52

Reported byscott@quadhome.com, Aug 9, 2007

CSS keywords "thin" and "thick" are not in the whitelist.

Aug 9, 2007scott@quadhome.com

This issue was originally noticed at:

http://wiki.whatwg.org/wiki/Sanitization_rules

I assume feedparser and friends are all affected since they share the code.

(Patch dropped because it'll be as much effort to deal with changed paths and everything as to just rewrite it.)