Perspective Match does not match with Arnold

[Henri_Chretien]

After creating a physical camera matched to a photograph with Max's Perspective Match, the rendered view differs a great deal from the viewport camera. I've read this has to do with the camera not having a uniform scale. Looking at the camera the scale reads 99,904x - 99,259y - 104,618z. Setting the values to 100 fixes the render/viewport discrepancy, however, it also messes up the perspective and the camera no longer matches the bitmap. The other renderers that ship with Max do not seem to care about camera scale and work fine either way. Arnold however does not. Any fix for this?