Does Webkit actually render 8-bit PNG files correctly?
I ran into some weird problem while trying to optimize the following image:

It should have a slight shadow on each of the left and right sides. However, in webkit (mac safari and chrome tested) the right edge loses its little shadow entirely. I've used several utilities to create the image and even tried to copy the inverted version of the left side to the right, all to no avail.
Did I create the png wrong or does webkit have a problem? It looks like it does in Firefox, IE, etc.
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