[Dovecot] IMAP error after login

Hello,

I'm having a slight problem with Dovecot (0.99.10-0.rc2, on Debian woody). When using mozilla 1.4, there is an error message from the mailer just after login, but nothing in dovecot logs. "Alert The current command did not succeed. The mail server responded: Error in IMAP command UID: Too long argument.."

How could I fix this problem ?

Thanks,

Nico J'ai une panne de micro et les parasites me brouillent l'écoute