I was getting the following pop up error on my Google maps page:

“The Google Maps API key used on this web site was registered for a different web site. You can generate a new key for this web site at http://code.google.com/apis/maps/.”

Even after generating a new key, the pop up still appeared. The site is using the sugurim control. The fix was to change my web.config setting for the API key. I had named it “GoogleMapKey”. I changed it to “googlemaps.subgurim.net” and it started working.