reconstruct removes messages?

[Patrick Radtke]

We had a user with approx 525 messages in her mailbox, but she was  
only able to see about 500 of them (e.g (two different) clients said  
there were 525 messages, but only 500 where available to see)

We ran reconstruct (with -r) on her inbox and all but 9 of the  
messages disappeared.

any ideas?

We're going to do a tape restoral but that won't really work if  
reconstruct just deletes the messages we restore...

running 2.3 with delayed expunge.

-Patrick