[Dovecot] blank forwarded messages

[lenny at edpausa.com]

Just switched from uw to dovecot ( latest beta3 + lda ) on production
system and everything seems fine except...
 There's some strange problem with forwarding messages from thundebird,
the body of the forwarded message is always completely blank - 0 byte
size. Forwarding from squrrel, horde, eudora and outlook works fine.
Client
setup on thunderbird installs hasn't changed a bit. I'm still
investigating why this is happening.

Has anyone run into this ?