If your asking about Villagers, then no.
1.8 brings Endermen, Cavespiders and Silverfish.
Mob changes:
Skeletons hold full sized bows.
When killed chickens drop ..chicken, and cows will drop beef.
Also zombies will drop rotten flesh.
They change the snouts of the pigs.
And I'm pretty sure arrows will now stick out of mobs when they are shot.
Sprint for the docile ones....O_o eh... they are easy enough without sprint...lol
But yeah that is the only AI changing thing i can think of myself, beyond the fact you will have a few more mobs to look out for...
1.8 brings Endermen, Cavespiders and Silverfish.
Mob changes:
Skeletons hold full sized bows.
When killed chickens drop ..chicken, and cows will drop beef.
Also zombies will drop rotten flesh.
They change the snouts of the pigs.
And I'm pretty sure arrows will now stick out of mobs when they are shot.