ded/morpheus — pull request #30 by rogchap (2012-08-09 11:37:56+00:00)
Title: Added support for backgroundPosition in px an %

Includes tests and example.

Support for animating the background position seems to be lacking in a lot of javascript animation libraries; *background-position-y* and *background-position-y* can be used but is not supported in Opera or Firefox.