Here is a new beta release of Fail2ban. This version contains mostly bug fixes. A new option "ignoreregex" has been added. Please look at the CHANGELOG for a more complete list of changes.
This version seems to be quite stable. The next releases should be release candidates.
Yaroslav Halchenko who maintains the Debian package of Fail2ban is now an official Debian Maintainer. Congratulations and many thanks to him for his work on Fail2ban.