Sneak Attack Rules Question

[Galamir]

Hello all, I am DMing my first adventure in 4th edition. I have a question about sneak attack damage on a critical. Does the damage from Sneak Attack get maxed along with the damage from the weapon?

Sneak Attack
Once per round, when you have combat advantage 
against an enemy and are using a weapon from the 
light blade, the crossbow, or the sling weapon group, 
an attack you make against that enemy deals extra 
damage if the attack hits. You decide whether to apply 
the extra damage after making the damage roll. As 
you advance in level, your extra damage increases.
Level  Sneak Attack Damage
1st–10th +2d6
11th–20th +3d6
21st–30th +5d6

Critical Hits
When you roll a natural 20 and your total attack roll 
is high enough to hit your target’s defense, you score a 
critical hit, also known as a crit.
CRITICAL HIT DAMAGE
✦ Maximum Damage: Rather than roll damage, 
determine the maximum damage you can roll with 
your attack. This is your critical damage. (Attacks 
that don’t deal damage still don’t deal damage on a 
critical hit.)
✦ Extra Damage: Magic weapons and implements, as 
well as high crit weapons, can increase the damage 
you deal when you score a critical hit. If this extra 
damage is a die roll, it’s not automatically maximum 
damage; you add the result of the roll.

 

[Kordeth]

Yes, sneak attack damage is maximized. The only damage that isn't maximized by a critical hit is extra damage caused by the critical hit itself. Sneak attack is not caused by the critical hit itself, so it is maximized.

Ditto Hunter's Quarry and Warlock's Curse, for that matter.

 

[ValhallaGH]

Yes, sneak attack damage is maximized. The only damage that isn't maximized by a critical hit is extra damage caused by the critical hit itself. Sneak attack is not caused by the critical hit itself, so it is maximized.

Ditto Hunter's Quarry and Warlock's Curse, for that matter.

Or Barbarian at-will extra damage. Or any other bonus dice that appear on the non-critical version of the attack.

If you'd get to roll it for a normal hit then it is maximized on a critical hit. Period.