What I expected to happen was...:
Redstone wiring should have a correct texture.

What actually happened was...:
Restone wiring face the wrong way and the texture was messed up. It still worked, though.

Steps to Reproduce:
1. Grab some redstone items.
2. Create a simple circuit (e.g. lever connected with redstone dust powering a piston)
3. Have a look at the texture of the redstone dust. (P.S. I use Flows HD for 1.7.2 as my resource pack)