[Dovecot] What is that error all about: "Timeout leak: 0x4bd230"

Hey dovecot-users,

we are running dovecot 1.2.15 and are seeing some odd errors in our logfiles:

--- dovecot.log --- 2010-11-22 12:34:56 imapserver local2.warning dovecot dovecot: IMAP(username@domain.tld): Timeout leak: 0x4bd230 --- /dovecot.log ---

Those errors only appear if connections are done using IMAP (via Horde's IMP Webmail). With POP3 we don't see any of those errors.

We actually don't see anything in general being broken or wrong (no errors on the webmail machines, no user complaints), but these errors are constantly being logged.

Where would one start to look for the cause?

Thanks for your help, Regards

Christian