Minecraft Item "Skull" crushes Minecraft in Multiplayer

What I expected to happen was...:
I wanted to place a Minecraft Costom Player Skull on a private minecraft 14w11b Server and continue playing.

What actually happened was...:
When I placed the Skull, Minecraft has crashed, but the Server was still running and when I reconnected the Skull was placed.

Steps to Reproduce:
1. You should check if the Bug also happens when you do so.
2. Maybe you should watch the skript of the Skull (A Skull also produces a lot of lag in Singleplayer)
3. Maybe you will find a Texture loading bug and I hope you are able to fix it.
4. I also put the Minecraft Crash report to the Attachment.