I can't describe exactly but this error has occured twice now.
When a nether portail reached (netherworld >>> overworld)
Environment
OS: Windows XP (ver 5.1, arch x86)
Java: 1.7.0_45 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.3.7 (bootstrap 5)
Minecraft: 1.7.4 (updated Mon Dec 16 15:44:19 CET 2013)
Duplicate of Unresolved
MC-28788
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