Please see http://www.gnupg.org/buglist.html for a list of know bugs in GnuPG. We don't distribute this list anymore with the package because a more current one with notes in which version the bug is fixed can be found online. For security related bugs, please contact <security@gnupg.org> which directs mails only to the core developers. If you need to encrypt the report you should use the public keys of the maintainer and of 2 or 3 other active developers (consult the ChangeLog and AUTHORS).