Sorry for the delay of 2.1.6 but a serious bug was found in the previous beta releases. I put a final beta release before jumping up to the release candidate. The bug is related to 'Privacy -> SPAM filter -> header_filter_rules'. So, I want all of you, who have had brave souls to upgrade 2.1.6 beta and who use this feature, to upgrade again to 2.1.6 beta 5.
The tarball is placed at
# Sorry but it looks like I have not access to the file releases on SF.