U see, the textures get rendered but not the material applied to the plane. When I turn off “Textures” in the shading settings
then the material gets rendered, but not the textures. (I’m using Blender 2.5 Alpha)
I’m not getting any problem whatsoever, I applied a transparent map to all your objects and they still render as the material at those transparent areas. If you dunno how to fix your error , just create a new material from the default and don’t change anything in the more advanced settings. Just change the diffuse spec val and col and then apply the texture rightaway. THen you shouldn’t have any problems (if I understood your problem correctly that is)
you didn’t pack any textures so I just used some random maps I had flying around and yes, I did see both the material in the alpha0 regions and the texture itself. I use blender 2.56a