hm, can't reproduce that here with the same setup... the address, latitude, longitude and zipcode returned from google's geocoding api must have been insanely long to exceed the 5MB quota. sorry that happened :(
Seems like the fix for that would be to serve up the html on your own domain so that other sites, eg dropbox, won't mess with your quotas.
Also, that would fix the location permission dialog that says "dl.dropbox.com wants to track your location".