In the summer there was an errata with Energy Explosion now doing knockback if damaging opposing characters. Has this changed with the newest erratas?

EE doesn't do auto-knockback when damaging characters at all. Only on doubles.

When you hit doubles on EE and all that, the characters farthest from the EE'r are KB'd first then work your way through the others towards the attacker. Just as long as all characters are KB'd AWAY from the attacker.

That way, the front row dudes aren't staying there because the ones behind them are impeding the KB path.

Hope that helps.

Maybe they made an error then. In this summer in the Player's Guide they wrote:

Energy Explosion
 All characters that take damage from an Energy Explosion attack suffer knock back (if applicable), except the figure using the power. These characters must all move away from the character that used the power, starting with those farthest from the attacker.

http://heroclix.com/wp-content/uploa...2010_06_17.pdf

the "if applicable" part is the key. that means if doubles are rolled or a special power causes knockback.

And it was the confusion you expressed which caused them to rework that clarification. To be more clear it now says....

From the Player's Guide:
Both clarifications are trying to express the same thing, but the updated version is clearer.