[Dovecot] Mdbox corruption

[3.listas@adminlinux.com.br]

Hi,

I have a "ubuntu10.04 + ext4-filesystem + dovecot-2.0.13 +mdbox" 
configuration in my server. It works fine with ~50k accounts.
Recently happened a filesystem corruption in a device of StMailLocation 
and I fix with fsck.ext4.
After this crash, one account began to show access timeout and errors 
like this on force-resync:

# doveadm force-resync -u account INBOX
doveadm(account): Warning: mdbox /path-to-mdbox/storage: rebuilding indexes
doveadm(account): Error: Corrupted dbox file /path-to-mdbox/storage/m.83 
(around offset=16): EOF reading msg header (got 0/30 bytes)
doveadm(account): Warning: dbox: Copy of the broken file saved to 
/path-to-mdbox/storage/m.83.broken
doveadm(account): Error: Corrupted dbox file /path-to-mdbox/storage/m.83 
(around offset=16): EOF reading msg header (got 0/30 bytes)
doveadm(account): Error: mdbox rebuild: Failed to fix file 
/path-to-mdbox/storage/m.83
doveadm(account): Error: Corrupted dbox file /path-to-mdbox/storage/m.92 
(around offset=7): Invalid dbox version
...

Should I worry about the m.X.broken files ?
How I fix these broken mdboxes ?

Thanks.

--
Thiago Henrique
adminlinux.com.br