I'm having a weird problem with my Ambient Occlusion map. For some reason some bits are completely black (in places where shading wouldn't make any sense). Every other place I check says that I have to recalculate normals, but that doesn't have any effect. How can I fix this?
As well as Recalculate, there's the "Flip Direction" tool in the Shading/UVs tab of the tool panel, you can try using that on the specific selection where there's a problem.