kbwood/backgroundpos — pull request #2 by StephenHaney (2013-06-12 07:58:04+00:00)
Title: IE8 Support for Animation Init

IE uses 'background-position-x' and 'background-position-y' instead of
'background-position'. jQuery .css('background-position') returns
undefined in IE8, which was causing a jump before animation in my use
case. I added the appropriate code to the initBackgrondPosition
function to support IE8.