[Dovecot] Another dovecot-lda / deliver Segfault

I just upgraded from 1.2.11 to 2.0.5.

When I send mail from a virtual local user, to another virtual local user, the email sends fine (passing though postfix, then amavisd, then to dovecot deliver) and the recipient receives it, but during this deliver segfaults (pointing to libdovecot.storage.0.0.0) and sends an undeliverable message back to the original sender. This does not happen if someone outside the localdomain sends mail, and does not happen sending from local to a remote address, just purely from virtal to virtual locally.