Currently I'm running GE 5.0 which performs well, but it's UGLY, the fonts, that is.
GE 5.1 is at least a lot more polished, but then renders unusable because
several layers (i.e. streetview, places, etc) are thoroughly misplaced; +/- 50 km SW.
And that misplacement varies from country to country.
I'd very much appreciate it when somebody could verify this.
Downloads: Googleearth 5.0: http://download.cnet.com/google-earth/
Googleearth 5.1: http://www.softpedia.com/get/Others/Home-Education/Google-Earth.shtml
Installing as well as uninstalling is a breeze: make GE executable (chmod a+x GoogleEartLinux.bin)
and then execute from within the working directory ./GoogleEartLinux.bin
Uninstalling is done by simply clicking 'uninstall' in ~/home/whoever/Google-Earth.
Keep in mind that GE is a static app, so none of these actions will affect your system.
Thanks!, cheers, Hoos.