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    Bug 
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    Resolution: Duplicate
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    None
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    Minecraft 14w29b
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    None
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    Os: Windows 8.1 java: 1.7.0_40
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        Unconfirmed
I was making a mob spawner And after i put a roof on i had a weird Lighting Bug, And It Was Making No Mobs Spawn 
- duplicates
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                    MC-80966 Lightcalculation of ChunkSelection faulty implemented resulting in client bugs (empty chunks don’t show light/render dark) - Resolved