[Dovecot] dovecot report W value error and Corrupted index cache file

Hello everybody,

I have a problem and no idea.

Yesterday Dovecot.log report:

Warning: Fixed a duplicate:

     /opt/*/cur/<time>.M*.<domain>,S=*,W=*:2,S -> <time>.M*.<domain>

Now Dovecot.log report:

     Error: FETCH [ ] for mailbox INBOX UID 10546 got too little data:

79850 vs 81231

     Error: Maildir filename has wrong W value:

/opt/DIR/DOMAIN/USER/cur/1281317869.M*.*,S=79569,W=81231:2,S~

     Error: Corrupted index cache file

/opt/DIR/DOMAIN/USER/dovecot.index.cache: Broken virtual size for mail UID 10546

     A few days ago, we used a new machine for mail server (and we used

maildir format with dovecot-1.2.0).In fact ,we used iRedmail on CentOS5.

     And last week, I copy some mail data from old machine to new one

through SCP and CP command. It worked well.

Yesterday, I copy the mail data from old machine to new one through RSYNC. I guess maybe the errors have a relationship with rsync, because the new machine open SELinux and the rsync data error. Although the files were copyed to /cur directory , it seemed to appear the same mail file.

     Now,I receive some BLANK mails by pop3 of OutLook2007 . There are

not any Header and any Body( Totally BLANK). Outlook show they are 760B size.

     I am confusing for this problem. Please help me. Thank you.