Google Map not zooming

After completing a category search in the Directory Theme, you are given 3 choices of how to display the results (using the 3 little icons at the top of the search results).
One of those choices is a Google map.

In the admin area, I have set the Google Map zoom to 17 and entered the latitude/longitude as 34.0574° S, 151.1522° E … but when I click the little map icon, all I get is a map of the world that is not zoomed.

Can anyone suggest what I’m doing wrong here?
Any help appreciated 🙂

Wayne