If you use the AMD Catalyst/fglrx driver on Ubuntu you may want to avoid upgrading to the Xenial Xerus next month.
AMD have released a new version of their graphics driver Catalyst for Linux. The new version, 11.4, contains back-ported X.Org Server 1.10 support in order to function with Ubuntu 11.04, Fedora 15, Arch Linux, etc.
The last time I tried Google Earth on Ubuntu was late last year and I remember I couldn't get it working with Compiz enabled - OpenGL was slow and flickered so much it was unusable when effects were enabled. When they were disabled, it wasn't much better. I installed Google Earth on Maverick and I was blown away by how awesome it was. Click through for videos and install instructions.