mrdoob/three.js — pull request #4190 by MIND0S (2013-12-08 04:39:33+00:00)
Title: Examples: Fixed position issue for webgl_geometry_extrude_uvs2

The origin is shifted to upper-right. I found the reason and fixed it.

It seems that these commented lines made the erroneous shift, but the reason is subject to inspect.
targetCanvas = renderer.domElement;
/// Don't add it
//targetCanvas.width = WIDTH;
//targetCanvas.height = HEIGHT;