Every item in the inventory's name is changes. For example, Diamond Sword is named (Diamond Sword) and Spawn Rabbit is named (Spawn Rabbit), etc.
This is just a weird little bug :/
Environment
OS: Windows XP (ver 5.1, arch x86)
Java: 1.7.0_55 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.5.1 (bootstrap 5)
Minecraft: 14w31a (updated Thu Jul 31 02:38:05 NZST 2014)
Dupe of MC-64409