I have only two active users, one with about 4GB of message data, the other with about 700MB. The full backup just over a week ago took over 4GB of disk space, but the most recent full backup occupies only 200MB. I have verified that the message store occupies about 4.8GB. I noticed this because I am doing a weekly archive of opt/zimbra/backup to tape and the most recent backup only copied about 200MB of data. Is there something wrong with backup?

This is 4.5.5 running under OS X 10.4.9.

thanks for any advice,
Ron.