This is an identical copy of the [His and Her Owls]. However, the STL file supplied for that model does not work with MakerWare due to "inverted normals" on the female owl, meaning MakerWare was interpretting it as "inside-out" and couldn't render it. I was able to fix the problem in Blender and re-export it properly. I successfully loaded it in MakerWare and printed it without issue on my MBot Cube II.