Smarter mobs!?!?
From around 1.5, the mobs were like moving around the whole time, but now, mobs are not moving an inch if I'm not in radius of them. I just built a giant mob trap with 18 mob floors, and mobs are barely jumping into my kill floor. I have put signs so that they would recognize it as 1 block, but...no luck. 
The spawning room is not even big...I checked out the floors and it was packed with mobs, but they weren't moving an inch.
Is there anyway to get mobs to move around or like any mods or anything?
I would appreciate any replies...in my previous post I did not like the amount of replies I got.

The spawning room is not even big...I checked out the floors and it was packed with mobs, but they weren't moving an inch.
Is there anyway to get mobs to move around or like any mods or anything?
I would appreciate any replies...in my previous post I did not like the amount of replies I got.

