if the problem i srelated to touching 3D connexion controller in Autocad 2011 or 2012 try typing the command 'PLAN" and then the command "world" and that should strighten out the drawing. I have never had a situation where the ndrawing was unusable.
This issue has been reported by me through my subscription to Autodesk support. I have been only told there they are aware of the problem and they are working on it. But my concern is there enough emphasis on this problem by others. I assume that the "squeeky wheel gets the most oil" principle applies here.