[Plugin: Geolocation] Only half-works

I’ve installed the official Geolocation plugin on my self-hosted WordPress blog. One part of it works as described: if the post was made with the iOS app and included the geolocation, a link appears at the bottom of the post and a map is displayed when the mouse is dragged over the link.

The second part doesn’t seem to work: When attempting to add the geolocation from the Edit Post page, type the address and click on the Load button – nothing happens, the map does not get updated to show the address entered.