I heard there are problems with running AutoCAD for mac with Lion. Well, I am running Lion, and really don't want to downgrade to Snow Leopard unless I really need to. I heard there was a program in beta that would fix the problems, but I wanted to know if anyone had any experience with this, and if they had anything to say about it. Also, are there any other CAD softwares that are free and mac-friendly?

Thanks!