One thing that I’ve seen a lot of emails about over the years is border issues; borders that aren’t quite accurate enough, or (most often) borders that are in political dispute. People didn’t like that Google was seeminly “taking sides”, even though they were really just trying to make them as accurate as possible.
With some nice new changes, borders are now much more accurate and disputed borders are indicated as such. Here’s a great example of a disputed border, where it is unclear who this island belongs to:
The accuracy of borders is also greatly improved. Google has some great examples on their blog that you should check out.
The new updates are live in Google Maps, and will be coming very soon to Google Earth.