Firefox 3 visual integration with Vista: What the #@$%???

Way back in October, I expressed great joy at seeing the following mockup of how Firefox 3 would look on Windows Vista:

This just seemed to good to be true. I mean, this thing looks like a smoking Vista application.

I've been waiting eagerly for this look and feel to be integrated into the Firefox 3 beta, and while Mozilla has shipped two major changes to the OS X theme, nothing had appeared on Windows. 

Until this.

Dear God. Tell me this is a joke. Please. Tell me it won't look like that, and that you're not really moving the Home button to the Bookmarks toolbar? (The name of the toolbar alone should explain why this is dumb.) 

Please.