In pinry.js, reference is made to image.width and image.height
properties, neither of which exist. They are used to compute the
target height of the image, by computing the aspect ratio
image.width/image.height. Unfortunately, undefined/undefined yields
NaN, and so we end up writing "height='NaN'" into the HTML.
It looks like webkit (at least chrome) ignores it when the height
attribute on an <img /> element is set to NaN, but Internet Explorer
treats it as zero. That's why it didn't look broken on other browsers.