zmmailbox getAppointmentSummaries has changed behavior in 6.0.4

[tkoop]

We have just upgraded to 6.0.4 (I don't know from which version though).

We had a script that calls zmmailbox getAppointmentSummaries (with a few more settings of course). It used to return a list of events along with properties for each event, in json format. Now it just returns something like this:

[[ZAppointmentHit 65818],
[ZAppointmentHit 65893],
[ZAppointmentHit 66010],
[ZAppointmentHit 66061]]

Is this expected behavior? If someone can confirm that this is a bug, I'd be happy to follow proper bug reporting procedures.

Can anyone tell me a work-around so I can still get a list of appointments?

Thanks for any advice or comments.

--
Tim