badlogins pop3 thunderbird 3.1.6

[Eugen Bier]

hello all,

we have strange behavior of our cyrus 2.3.16 on pop3 and pop3s protocol 
with thunderbird 3.1.6. User does connect to a mailbox correctly, the 
first login is successful. After 5 min, when the user reconnects to a 
mailbox it comes to a 'badlogin' and then the client attempts to login 
every 1-3 seconds producing 'badlogins'.

Has anybody else the same behaviour? I think its a bug of thunderbird, 
but who knows.

regards,

Eugen Bier