terrain exists but not rendering in build

Question says it all.
After I make a PC build, the terrain doesn’t show. Ive tried using fresh terrain, and my old terrain.
Ive tried making a brand new scene with both the old terrain and new terrain.

PC-32x build. Unity 4.0

anyone else experience this?

Update: The terrain EXISTS in the build, because I can drive on it, and go up hills, etc. its just not rendering

yes I did, but it had nothing to do with a Terrain. I had a mono-behavior that was saving styles from UnityEditor.GUISTYLEs info, and trying to bring it into the build (un-intentionaly)

I wrapped my monobehavior classes that had editor stuff in it (i needed it that way) with some

#if UNITY_EDITOR
  //editor stuff
#endif