When I try to accept an Outlook meeting request it tells me I am the organizer, though I am not.

When I try to accept an Outlook meeting invite it tells me I am the organizer, though I am not, and I cannot accept the meeting invite.  This seems to happen for recurring meetings only.  If I open the meeting via 'Open this occurrence' from the calendar, the organizer and attendees appear correctly. If I open the meeting via 'Open the series' from the calendar, I am listed as the organizer. We have multiple users experiencing the same problem.  None of the organizers or attendees have delegates.  The only common thread seems to be that these are recurring meetings that have been moved to a different day and time.  We have had the organizer remove the users from the meeting but when the users try to delete the meeting from their calendars they get the same message "As the meeting organizer, you do not need to respond to the meeting.". 
We have a mixture of Vista and 7 clients all using Exchange 2007.  OWA and Outlook 2007 show same behavior.
Anyone know the fix?