I'm not sure how much bearing this has on your particular problem, but I notice that you have entered the coordinates:
You have the lat & long coordinates mixed up, they should be:
(Also note the minus before the longitude).
This may be confusing google.
I'm using ADDRESS (focus "Kentfield"), not lat and long. If they're in there, the script must have inserted them.
I removed them manually but it's still working fine in FF and throwing that error and not default zooming properly in IE.