I didn't know about this one. It is possible to make these older themes (and other addons) to work with Firefox 4. You can find some instructions on my web page www.telemail.fi/tsareq. With my instructions you can get the fox back for this theme and you can find the original theme there too.
I'd had the old Foxkeh theme for a while. Finally I updated my Firefox not realizing that it would make my beautiful theme obsolete. I miiiiiiss my little running fox... :'( This one is cute too, and makes a nice substitute, but I would LOVE another Foxkeh theme!! ;)