Display issue in Opera with Retina displays

I've imported an SVG image into my Edge Animate project and used percentages on both X & Y properties, as well as the images width and height. This scales the vector image perfectly across the board, the only exception is with Opera on MacBooks running a Retina display. On these devices the image size increases by 4.

I'm running with the most up to date version of Edge, OSX and Opera.

I've enclosed a link to a demo:

https://dl.dropboxusercontent.com/u/12645552/edge_demo/test.html

This is what the demo looks like in all browsers except Opera:

Safari:

And this is how Opera outputs the image:

Any assistance would be appreciated.