[Dovecot] blank line at the top of mbox

[KB Digital]

Hello,

It seems dovecop pop3 server sometimes inserts a blank line at the top 
of the mbox.  It only happens for certain users not all. 
I'm not sure why it's doing that.

Looking back into the mailing list, I saw the same post in Oct 6, 2003
but there was no reply to it.

Is there a patch or fix that i can use to get around the blank line?

Thank you.
Ken