I've got to say - and this in a way makes sense: The model seems to be very "URL-oriented" ...
... as in (at least in the demo, the search one) if you ask it to visit a site by name (ie. "Go go Altavista and ...," ...
... it will complain "no URL" has been provided.-
It probably has to do with the "special instructions" given to the AI for this one program/demo ...
... still.-