Upgrading to the latest NVidia driver has an interesting effect on the default view in Goolge Earth, it turns on stereoscopic 3D whether you want it or not. There is not option to disable this view in Google Earth, but here’s how to do it.
The trick is to disable 3D in the NVidia control panel.
See that check box in the middle of the screen shot? Uncheck it and click apply. Then launch Google Earth and everything will be in regular non 3D glasses needing mode. But if you do have a pair of red-blue 3D glasses give it a try. You can always disable it again in the NVidia settings.
Update: After installing the latest NVidia drivers it defaulted back to enabling 3D. It looks like you have to disable it each time the drivers update.