Aircraft flying at unusual angle.

[benson]

Hello. I've done a search for this but come up with nothing. My aircraft don't fly straight. They fly level but looking at them head on, they are at an angle. When they fly high enough to cause contrails the aircraft is travelling in one direction and the contrails are streaming back at a totally different angle. In Flyby view it looks absolutely ridiculous. Even the icon on the map is flying sideways. I'd be grateful for any suggestions. I tried emptying the cache, trying different key set ups for the views but no good.