[Dovecot] nfs_flush errors

[Hans Wunsch]

I'm looking for some help with an nfs error that is filling our logs.  I 
get a constant stream of these messages:

  Jul  8 10:47:08 servername dovecot: [ID 107833 mail.error] 
IMAP(username): nfs_flush_file_handle_cache_dir: rmdir(/var/mail) 
failed: Device busy

 I have two dovecot IMAP servers.  All mailboxes are NFS mounted.  The 
INBOX is /var/mail and the rest are in /home/<user>/mail. 

It looks like work was done on this back in January:  
http://www.dovecot.org/list/dovecot-cvs/2008-January/010638.html
And again in February:  http://hg.dovecot.org/dovecot-1.1/rev/258477a3f1e7

Was a there another fix that I missed or is anybody else is still seeing 
the same issue?

Thanks,
Hans