I have a road system in my single player survival world paved with stone slabs. When trying to ride pigs on the roads, the pig bounces up and down and only moves slowly forward as if it is continually trying to jump up blocks, even though the road is level.

I have reproduced the problem in creative mode and tried it with different types of slab with the same result.

There is no problem if the slabs are in the upper half-block position, only in the lower half-block.

What I expected to happen was...:
Pigs should move in the same way on slabbed surfaces as on top of full blocks.

What actually happened was...:
See above.

Steps to Reproduce:
1. Make a surface out of stone slabs (in the lower half-block position).
2. Saddle up your pig and get your carrot-on-a-stick out.
3. Ride the pig on and off of the slab surface to see the difference. Switching to third-person viewpoint makes it easier to see what is happening.