[Dovecot] PC-Pine "Junk in end of group"

I am running PC-Pine under Windows XP, connecting via SSL to a Dovecot IMAP server (0.99.10-2 under Debian woody). When I open a mail folder (mbox format) in Pine I get the following non-fatal error:

[Junk in end of group: pn=undisclosed-recipients al= dn=]

A similar error was reported to comp.mail.pine as happening with a Lotus Domino server. Mark Crispin explained it as a server-side bug:

http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&safe=off&threadm=4192a0ec.0307090631.32e1a815%40posting.google.com&rnum=1&prev=/groups%3Fq%3D%2522junk%2Bin%2Bend%2Bof%2Bgroup%2522%26hl%3Den%26lr%3Dlang_en%26ie%3DUTF-8%26safe%3Doff%26selm%3D4192a0ec.0307090631.32e1a815%2540posting.google.com%26rnum%3D1

Is this something that can be easily fixed?

Paul