A few fixes and tweaks:
There was an edge case where a mob could spawn within your SimPlayer's area of awareness, but out of line of sight. If this mob engaged your party without exiting the SimPlayer's area of awareness (so it would have a chance to be re-assessed when it re-entered) the SimPlayer would remain unaware of the nearby target beating on him. This should be fixed.
Paladin Spell "Sunburst" no longer engages auto-attack (it is a CC spell).
Stuns were not working properly, and many mobs were immediately breaking stuns. This is fixed. Note that mobs DO have a stun cooldown, so once they're stunned once, they cannot be stunned again for a small duration. This does not apply to Dazzle, etc.
UPDATE 9:50pm EST - Celestial Pull was showing a 100% resist rate on all mobs, this is fixed. You can AE taunt again.