Hello, I have a problem. I have gotten on my world and a handful of times there have been hundreds of mobs everywhere. It kills my FPS and I'm only running 4 mods on that map (NEI, TinkersConctruct, Rei's Mini-map, Damage indicators). On other worlds (NEI, TinkersConctruct, Rei's Minimap, Damage indicators, Biomes O, Plenty). Here's a screenshot that I got while they started spawning. They spawn off of one, and can't be killed by the sun if hostile. Please help.
Hundreds of Mobs Spawning 1.5.2