In WinXP + FF 3.6.3 and 3.6.4, all I get is a grey box. There's nothing to drag around, just a background image.
This means that when I search, the default search radius of 20 miles is always applied. This, of course, can be corrected manually in the URL's querystring, but that's not how it's supposed to work, I assume.
EDIT: Is it possible this UI piece is pulling scripts from a site I've blocked? I'm running NoScript in Firefox.