The upcoming platform update is scheduled for Tuesday, December 23rd, 2014.
Bundler is updated to version 1.7.9.
Git is now on version 2.2.0.
libmysqlclient is updated to version 5.6.22.
Redis is now on version 2.8.18 which includes various new features and bugfixes.
Trying the new platform
You can evaluate the new platform right away by selecting Ubuntu 14.04 LTS v1412 (release candidate) from the Platform section of Project Settings. We encourage you to try it out, so that we can iron out any issues you may find along the way until the final release on next Tuesday.
A full list of changes is available in the platform changelog.