http://blog.chron.com/txpotomac/2012/08/republicans-reach-rules-change-deal-to-avert-floor-fight/ ~ there’s the story. names names. gives text. etc.
Doesn’t sound like they overturned the rules changes about being able to change the rules any time without having to wait until the convention, nor the one where Romney or the nominee can veto any part of the platform.
Also, some clarification on the idea of Romney overruling the platform. This was only said to be possible if the Rule 15 change happens, where Romney can substitute his own delegates for the states’ delegates. So that will go away if Rule 15 goes away.