Please describe the problem:
If I re-open a meeting that I've created, then click the Attendees button, all my previous attendees are not present any longer.  If I save this then they all disappear.

Steps to reproduce:
1. Select a time on the calendar
2. Right-click and select New Meeting
3. Click the Attendees button on the left side of the window
4. The selection dialog comes up with "Address Book" set to "Contacts".  I don't want that, so I change it to "Global Address List"
5. Select one or more attendees by typing their name in the Search box, then "Add"ing them to the Required Participants entry.
6. Click "Close".
7. Click "Save".  It will ask if you want to notify the participants; I said yes but I don't think this matters.
8. Go to your calendar view, right-click on your meeting and click "Open".  You'll see your attendees, as you'd expect.
9. Click the "Attendees" button again, so you can add new attendees.
10. The Attendees dialog comes up and again the default Address Book is "Contacts", not "Global Address List".  Further, there are no entries in any of the participants boxes.
11. Select "Global Address List".  The participants boxes are still empty.
12. Add new participants, then save.  The new participants you added will be visible in the Attendees list, but the original ones will be gone.
13. If your original attendees accept the meeting and you get back a message from them, Evo will ask if you want to update your meeting.  If you say yes, Evo will say that these attendees are not in the meeting list (even though they were) and ask if you want to add them.  If you say yes, they still do not appear in the attendees list for the meeting.

Actual results:
As above.

Expected results:
When I select the Attendees button I expect the original attendees to still be present in the "Attendees" dialog, so that I can add new ones (or remove existing ones).

Does this happen every time?
Yes.

Other information: