Modification to an appointment creates duplicates

[mtmoore]

Has anyone else seen this issue in Outlook 2003?

A meeting organizer sends out a meeting request to a number o
recipients, some internal mailboxes some mail-enable mailboxes tha
deliver to external recipients.

Later they modify the meeting which then duplicates some of th
mail-enabled recipients in the invite field, so for example:

Original request:

bloggs, joe; doe, john; doe, jane

Modified request:

bloggs, joe; doe, john; doe, jane; bloggs, joe; bloggs, joe

Any ideas? It does seem to be duplicating the internal mailboxes.

Thanks