Open 2.5.3: Mobs Spawning Outside Of Mob System

[Jonny5j]

Version:
2.5.3

What is the bug:
Right when I updated to version 2.5.3, mobs started spawning outside of my mob farm, even though it was fully lit up. The sources that I am using to light the area up are carpenters blocks with glow stone dust.

Mod & Version:


Paste.feed-the-beast.com log:


Can it be repeated:


Known Fix:

 

[UniZero]

I have had issues with this myself. Just use a different light source.