usermin - ambiguous error when user quota reached

Hi, today a user reached is quota and usermin was giving this error: An error occurred listing mail in this folder : Failed to login to POP3 server : Internal error occurred. Refer to server log for more information. [2008-01-08 12:43:35]

Dovecot was reporting this: dovecot: Jan 08 12:43:35 Error: IMAP(user@domain.com): write_full(/home/otherdomain.com/domains/domain.com/emails/user/mail/dovecot-uidlist.lock) failed: Disc quota exceeded

is it possible to make usermin aware when quota is reached and report it correctly?