I have more than one blog, albeit on the same server, but different domains.
So far I've installed on three blogs.
One worked fine, the other two didn't.
I couldn't get the Visual editor to work at all, either in Firefox 2.0.12 or Firefox 3b3.
Trying IE8 there was no title box, and no editor tabs whatsoever. IE7 gave me non-visual editor, as in Firefox. Things not working in IE never surprises me anyway, as it's a pretty dysfunctional non compliant browser in all versions.
Anyway, the fix I found was to completely delete the tinymce directory which is located at /wp-includes/js/tinymce and re-upload it. That got the visual editor working 100% for me, on both sites, in Firefox 2 and 3. (windows and linux) IE7 seems to work ok, and IE8 beta 1 even too, although it makes a huge title box.