Cant write in book and quils.

Renaming a book and quil in an anvil makes it so you cant write in the book.

Steps to create bug:
1.Get a book and quil
2. Rename it in an anvil to anything.
3. Then try to write in it.

NOTE: I did this in multiplayer bukkit 1.6.2. I dont know if it makes a difference but I thought i should mention that.