Puppet Agent 1.6.1 is now available. This release includes Puppet 4.6.1 (containing a critical bug fix, as well as a number of smaller fixes).
Yesterday we removed Puppet 4.6.0 (and puppet-agent 1.6.0) from our repositories after users found a critical issue (PUP-6608) affecting variables defined in a class not being in scope after resource-like declaration of that class.
Users who had installed Puppet 4.6.0 (puppet-agent 1.6.0) should upgrade to Puppet 4.6.1 (puppet-agent 1.6.1).
This release fixes the critical issue and several smaller bugs in Puppet and Facter.
Release notes are linked from the puppet-agent 1.6.1 note: https://docs.puppet.com/puppet/4.6/reference/release_notes_agent.html.
To install or upgrade puppet-agent, follow the getting started directions: http://docs.puppet.com/puppet/latest/reference/index.html.