This bug was fixed in the package ubuntu-wallpapers - 15.10.1-0ubuntu1
--------------- ubuntu-wallpapers (15.10.1-0ubuntu1) wily; urgency=medium
* Apply some lossless crushing using optipng. * New default wallpapers for 15.10 (LP: #1497177)
-- Iain Lane <email address hidden> Tue, 29 Sep 2015 17:59:56 +0100
This bug was fixed in the package ubuntu-wallpapers - 15.10.1-0ubuntu1
---------------
ubuntu-wallpapers (15.10.1-0ubuntu1) wily; urgency=medium
* Apply some lossless crushing using optipng.
* New default wallpapers for 15.10 (LP: #1497177)
-- Iain Lane <email address hidden> Tue, 29 Sep 2015 17:59:56 +0100