First of all: Thanks to @Waz for the hard work on this awesome mod!
I experienced an interesting bug whenever I jump directly from the Space Center to a ship in orbit: then the clouds seem to be fixed to the camera perspective rather than the planet and the cloud shadows do not match the clouds - they are just fixed at random positions on the surface of Kerbin. When I launch a new rocket or jump to a ship via tracking station everything is fine - the bug only occurs when I jump right into the ship (I'm using Haystack Continued for this - but I assume the same bug may occur with other mods giving the same functionality). I was able to replicate this in a fresh KSP install with only EnvironmentalVisualEnhancements and Haystack Continued installed. Here is a picture of the wrongly placed shadows: http://imgur.com/a/aoOaz - it looks even stranger when moving