I'm not going to dig through every round of errata to see when when exactly it was changed, but it does remove the initiative order, requirement to take action, and limit to how often a PC can use a secondary skill from the DMG skill challenge rules.
I don't understand what point you're making, though. I think the DMG shows the same fundamental intention as the DMG2, but if anything actual use showed they needed the emphasize creative freedom more and encourage DMs to be less restrictive in their rulings. The DMG tells the DM to be careful about is that actions should make sense in the in-game situation, and lean toward allowing things. It doesn't actually matter to me if they really changed directions or miscommunicated a vision.