Moose 1.18 (and 1.17) are again primarily bug fix releases. In particular, we've killed some bugs that were introduced in 1.15 with the changes to native delegations. If you're using native delegations in your code and you've already installed Moose 1.15 or newer, we strongly encourage you to upgrade.
This release also fixes some random older bugs that have been lingering in rt.cpan for a while.
Finally, this release moves Moose and all of its prereqs from
Test::Exception depends on
Sub::Uplevel, a module that tends to break with changes in the Perl core. This should make Moose a little more robust against future core changes.