WizKids have posted updates to their HeroClix Players Guide and other game documents.
From their website:
Every day GenCon gets a little closer. I get a little more excited and, at the same time, as I see deadlines approaching, I worry as to whether or not I’ll get certain things done as early as I want. There are a number of documents that I wanted finalized at least 2 weeks before GenCon, to make sure that the information had time to get out into the public and settle before the big events.
First on that list, is the Player’s Guide. This edition does not have very many drastic changes in it. Powers on the PAC that could have used the “locking” mechanic but didn’t are now rephrased slightly to use locking. Power Barrage got clarified to be explicit what powers it allowed you to use to attack with in order to get the bonus. The Debris battlefield condition got reworded a bit given the new rules for objects.