Walk Through Fences

When two fence posts (regular, or Nether Brick) are connected together, you can walk through the middle of them as if the bars connecting the fences have no collision.

When I walked into the middle of the fence, I expected my character to stop, like he was walking into any other solid block.

What actually happened was, I was able to walk through the middle of the fence. You can also jump over the middle.

Steps to Reproduce:
1. Place down two (or more) regular or Nether Brick fences next to each other.
2. Walk into/jump over the middle of the fence - where the two connect.