mrdoob/three.js — pull request #4625 by jahting (2014-03-28 20:02:33+00:00)
Title: CanvasRenderer: setViewport: devicePixelRatio applied

this is a follow-up to issues #4343 and #4336
with a device with devicePixelRatio != 1 the present bug can be seen at: http://jsfiddle.net/gU582/2/