The first point release update to our LTS release 16.04 is out now. This contains all the bugfixes added to 16.04 since its first release in April. Users of 16.04 can run the normal update procedure to get these bugfixes.
Warning: 14.04 LTS to 16.04 LTS upgrades are problematic, and should not be attempted by the average user. Please install a fresh copy of 16.04.1 instead. To prevent messages about upgrading, change Prompt=lts with Prompt=normal or Prompt=never in the /etc/update-manager/release-upgrades file.