[An on-line version of this announcement will be available at http://www.postfix.org/announcements/postfix-3.6.1.html]
Fixed in Postfix 3.6.1, 3.5.11, 3.4.21, 3.3.18:
Bugfix (introduced: Postfix 2.11): the command "postmap lmdb:/file/name" (create LMDB database from textfile) handled duplicate input keys ungracefully, discarding entries stored up to and including the duplicate key, and causing a double free() call with lmdb versions 0.9.17 and later. Reported by Adi Prasaja; double free() root cause analysis by Howard Chu.
Fixed in Postfix 3.6.1, 3.5.11, 3.4.21:
Typo (introduced: Postfix 3.4): silent_discard should be silent-discard in BDAT_README.
Changes in Postfix 3.5.11, 3.4.21, 3.3.18:
Support for Postfix 3.6 compatibility_level syntax, to avoid fatal runtime errors when rolling back from Postfix 3.6 to an earlier supported version, or when sharing Postfix 3.6 configuration files with an earlier supported Postfix version.
You can find the updated Postfix source code at the mirrors listed at http://www.postfix.org/.