I am no expert as you know Phil (but learning fast lol).
The page you say its displaying is the one the OLD test site is now presently showing. I am thinking even though you have deleted all that stuff, it could be holding onto something.

BK 1.0 was having a small problem earlier but is fine now.

It does look like it may have something to do with that old URL maybe. This is just a thought as i have seen nothing by anyone else about that particular problem. Maybe Fencer could help.

Ian