Re-computed height of a replaced element (with an intrinsic ratio, and both 'width' and 'height' specified as 'auto') based on a `max-width` value, isn't true based on the revised ratio

Regression: Bug not present in IE7

The image below should have the same proportions as the control image above

Re-computed height of a replaced element (with an intrinsic ratio, and both 'width' and 'height' specified as 'auto') based on a max-width value, isn't true based on the revised ratio