UPDATE: Dec13, new vector data, GEC layer update
From the keyhole bbs - We updated the vector layers and Google Earth Community layers. Improved appearance of roads (especially in Europe) and multiple levels of density for business layers (eg: dining, lodging) are the biggest changes. Better road data should improve frame rate on low-end graphics cards when roads are turned on.
The Google Earth Community layers were updated to midday, November 23rd and have improved/changed rankings.