Not sure how to word the title of this question. The picture below shows what I'm talking about:
As you can see the fronts of the machines are black. This happens with all thermal expansion machines, including the autonomous activator and terrain smasher I have downstairs. In NEI, the small icons of the machines look perfectly normal. Also, in the machine configuration the centre square is black; clicking on it has no effect. What's going on here? I'm using the yogscast complete pack.