Hello all.
Description of the problem.

When I show mailbox of one user, it's reports: 450 of 500Mb of free space used. But there are only 5 messages and nothing else in all other folders (ZWC).
But the folder store/$zimbra_user_id/msg/1 on the server contains about 450Mb and about 5000 files. I tried to reindex mailbox, but no effects.

I know, it may happens because of corrupt mysql database. If so, for which reasion it may be? How to track it? If not, what else? Thanks.

P.S. Zimbra 6.0.13 FOSS