+1 Button not appearing if not signed in

posted 14 Jan 2012, 03:51 by Philip Ridout   [ updated 24 Jan 2012, 09:00 by Philip Ridout ]
The +1 button on (public) Sites does not appear unless the viewer is signed in with a Google account.  This has been reported to Google and should be fixed in due course.
As of 24th January 2012, this is reported as having been fixed.