Can't see messages, reconstruct doesn't work

[Eric Knudstrup]

I have a problem in which there are messages in my main INBOX directory, 
but they aren't seen in my IMAP client.
Unfortunately, when I tell it to reconstruct through cyradm, I see a 
pair of .NEW files created, but they're empty and the reconstruct returns?
This is with 2.4.7.

Eric