[Dovecot] IMAP session state inconsistent

[list at airstreamcomm.net]

Running Dovecot 1.2.12 (we are in the process of upgrading to 2.1.x)

Didn't find much in old threads, but we are seeing the following in the 
logs this morning:

dovecot: imap-login: Login: user=<wajabrun>, method=PLAIN, rip=x.x.x.x, 
lip=y.y.y.y
dovecot: IMAP(wajabrun): Disconnected: IMAP session state is 
inconsistent, please relogin. bytes=443/1146
dovecot: imap-login: Login: user=<wajabrun>, method=PLAIN, rip=x.x.x.x, 
lip=y.y.y.y
dovecot: IMAP(wajabrun): Disconnected: IMAP session state is 
inconsistent, please relogin. bytes=561/1637
dovecot: imap-login: Login: user=<wajabrun>, method=PLAIN, rip=x.x.x.x, 
lip=y.y.y.y
dovecot: IMAP(wajabrun): file_dotlock_open() failed with file 
/mail/w/a/wajabrun/Maildir/.INBOX.02 ORDERS.Gaiam/dovecot.index.log: No 
such file or directory
dovecot: IMAP(wajabrun): file_dotlock_open() failed with file 
/mail/w/a/wajabrun/Maildir/.INBOX.02 ORDERS.Gaiam/dovecot.index.log: No 
such file or directory

Not sure what to make of this sequence?