User-deleted folders still on disk?

[Jeff Blaine]

Using cyrus-2.2.12

We're experiencing a situation where user-deleted folders still
remain on disk.

Running 'reconstruct -r user.USERNAME' does not address the
problem.

Is this expected behavior?  If so, I'm curious to hear the
reasoning.

Are we missing an option somewhere?  It's confusing our users,
as our "You are near your quota" script shows them, among other
things, a 'du -sk' listing of their spool area.

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