Whenever I get an AAF I fire up 5.1 and import it. After saving it I load 5.5 and open the project. This works most of the time. If all fails I have copies of PT 9 and Pro Convert.
I must admit that’s pretty ridiculous for a DAW made for Post. One would assume AAF import would be top priority and would be fixed in a matter of days or weeks, at the most…