[Dovecot] assertion on deliver (1.1.beta10)

Hi, I'm testing version 1.1.beta10 and getting these assertions on deliver:

file index-transaction.c: line 54 (index_transaction_finish_rollback): assertion failed: (t->mail_ref_count == 0)

This was after an upgrade from a 1.0 release candidate. If you need I can try and reproduce this in a more controled environment to pinpoint the problem.

Thanks,

Nuno Lopes