Ugly panel icon for Firefox

[Alan Evans]

A recent (last month or so) update changed the launch icon for Firefox
in my panel. Whereas it was smaller and sharper looking, now it's
larger and, subjectively, uglier.

I put a screenshot here: http://alanevans.org/lists/fedora-list-20090821.png

I distinctly recall that the icon used to be smaller and sharper
looking, much like the Thunderbird icon beside it. Now it just looks
oversized for my panel and out of place.

The same ugly icon appears on my recently fresh-installed and fully
updated F11 machine at home.