@mark2580: Morph targets are not supported in specific build at the moment, like explained in the
topic with current limitations and possible issues - that's why they are disabled by default in specific build.
As for previewing materials, they're quite complex with multiple layers of effects and some of them doesn't use diffuse textures. I've updated specific build to handle at least basic materials layout. It's recommended to disable shaders (Ctrl+G) and optionally change lighting mode (Ctrl+L) for better previewing.