I hate to do this.. I was determined to figure this out by myself, but am now running out of time and after spending the whole day and failing time after time.. I've got to ask you for help directly. If anybody here wouldn't mind taking a few minutes to look at my file and setting the material to work, please PM me and I will email you the file. Your help would mean a lot..

Here is the problem:
I have a scene with a house and a tree in it. The tree has leaves with alpha channels (paint effect tree converted to polygons). I want to render an AO pass of the scene. I set up two surface shaders, one for the leaves and one for the rest of the scene. The shader for the leaves have the texture plugged in and out_transparency on both sides, but I'm still getting those weird outlines around the leaves. I have also tried the method that Genny suggested in the previous thread using mia_material_x but failed at that too (the render takes a VERY long time and everything is black).