Bukkit

What steps will reproduce the problem?
1. Using /warp on horses
2.
3.

What is the expected output? What do you see instead?
The horses going to warps. The player is warped but SOMETIMES the horse will get bugged, where people cant move at all. They relog and the horse dies.

What version of the product are you using?
v7

Do you have an error log of what happened?
N/A

Please provide any additional information below.
Using /warp on a horse glitches them by random chance. You get stuck in the air, shaking randomly. Turning makes your hand slide off the screen (Not sure if that's at all significant)  I have changed the warp so it was in the air a bit more (Thought they might have gotten stuck in the ground) but it still happens.