If you have FSX, redownload Big Creek Lodge. The ADE concrete taxiways were showing through (you don't see this in P3D, Steve caught it for me). So that is now fixed.
Also, just so people can "see" the offset problem, which is actually pretty interesting, here are a couple of screen shots to show you the problems for a designer using IS3 when at altitude. (Big Creek Lodge is at 4100 feet!)
Attached are a couple of screenshots with Instant Scenery 3 turned ON and OFF. With IS3 turned ON, this is what the designer sees when s/he is placing things.
IS3 turned ON and Active: Notice the seagull, bush and the girl are all right on the top of the fence posts. Notice the fuel pump centered on the dock behind the fence. Note also that the dock is touching the ground, the other objects are "elevated".
IS3 turned OFF: This is what you see when IS3 not turned on. For some reason, the seagull stays on the post, but notice the girl, the bush and the fuel pump have moved. The dock, touching the ground does not move, but the fuel pump, elevated to match the dock, does.
So when you are designing with IS3, you can perfectly place things and they look good. But when you restart without IS3 running, the objects "move" from their original placement. This is NOT an IS3 problem, this has to do with FSX/P3D and it has happened for years. But when designing at altitude, you have to remember to place things ON THE GROUND, or they will fly away from the original position.