I haven't heard about anything that doesn't work in P5. There are a few things, as indicated above, that doesn't work perfect right away, but works fine with a little tweaking. Some hair models looks bad after rendering due to inverted normals, but that is easily fixed. A hair by Kozaburo behaves this way, and he has a fix described on his site (involves adding a very, very slight displacement in the Material Room, very easy to do) Some clothes might show parts of the mesh as transparent after rendering. This happens especially when you see the "inside" of the clothing items (like a long coat, where you see the part of it between the characters legs) and is due to the fact that these polygons are facing the "wrong" way. It's easily fixed by turning off the "remove backfacing polygons" feature in the render settings. This feature was introduced with the FireFly renderer to cut render times, but sometimes it creates undesired results.