Mob Spawner calculates light incorrectly, messing up their spawn position
Mob Spawners think that mobs should be spawned a block below any ground near it's 10x10 spawning room as they incorrectly recognize the ground blocks as the only source of dark light, making spawners unable to disable.
Environment
AMD HD5450
Windows 8 Professional Update 1
Intel i7 3770k
Linked Issues
Created Issue:
Mob Spawner calculates light incorrectly, messing up their spawn position
Mob Spawners think that mobs should be spawned a block below any ground near it's 10x10 spawning room as they incorrectly recognize the ground blocks as the only source of dark light, making spawners unable to disable.
Environment
AMD HD5450
Windows 8 Professional Update 1
Intel i7 3770k
Added Linked Issues:
duplicates

Can anybody confirm?
This post is a duplicate of
MC-57831.