Normally I would be able to right click on the image
in firefox and view
the image or copy the source and be able to tell but for some reason I
can't or Firefox can't figure it out and doesn't even treat it like an
image.
That's because it's included as a CSS background-image instead of with
an IMG tag.
That *might* explain the perceived transparency as well, but I'm not
sure about that.
-- F.