Apparently I'm an idiot, and I was doing something wrong, because this is now working for me.
Sorry about the incorrect report.
Edit: One other thing occurs to me - my initial test was done with a single other person in a completely different zone (which appeared to fail). The successful test was done with a full fellowship that was in the same instance as I was - proximity may be a factor.
Last edited by moebius92; Mar 20 2012 at 02:16 AM.