Devolv/cufon — comment on commit 3d050c8264207d4f42f543774cc485e7b4a99f10
File:  line 0
By Devolv:

This fix is still flawed, i believe

cStyle.height = canvasHeight + 'px';

Is where the problem lies as the padding bottom being calculated based on the default pixelRatio (is now doubled), and that's not correct if you are applying the height pixelRatio to the wrapper. PixelRatio should only be applied to the canvas.