Hah, do you know story about 64-bit AutoCAD Civil 3D 2009?? No? I'll tell you. Civil 3D depends of Microsoft Access database, but M$ do not plan develop Access on 64-bit, so Autodesk must write your own database for support 64-bit. If Autodesk developed AutoCAD for Linux then they can use for example My SQL or other open database which works well in 64-bit environment. I sad - Wrong decision with main platform. But in our sick World only what is mean is the money :(
