Are Node Group with Texture Broken?

This might be a silly question. I don’t know if this was working before hand, but are node groups currently broken in 2.57 when used with textures?

I was really excited about this release because of the changes to node groups that allow you to customize the inputs and outputs. I hope this is just something I’m missing and it actually does work.

http://blog.rustywidget.com/wp-content/uploads/2011/04/BrokenNodeGroup01.jpg