I have been having a problem with AAO recently. Well since about Blender 2.47. Every time I put something on a plane, it has these weird artifacts (see picture below) that really mess it up. Everything else that is higher above the plane is fine, only the stuff that is close. They are overlapping, just really really close. Any ideas why this is happening? Thanks in advance!
Have a look in this Thread - Looks as the same Problem
Yup that was it. Was wondering what the Error tolerance was… Thanks for the link Patel!