Kami/python-yubico-client — pull request #8 by fredrikt (2012-05-28 12:01:27+00:00)
Title: Allow sync level '0' (different than None).

sl=0 was actually broken in the server side code too, but we're rolling out a fix for that while upgrading servers. Two servers are already upgraded and will accept sl=0 - the others will respond BAD_SIGNATURE.

/Fredrik