Oklahoma delegates filed a challenge to the RNC Committee on Contests over the election of at-large delegates and at-large alternates at the State Convention. It was put forward by 13 people who were credentialed delegates to the Oklahoma State Convention. Some of these had already been elected National Delegates and Alternates at Congressional District Conventions.
The notice of grounds for the challenge was filed on July 26th, 2012.
Lots of information about the Oklahoma state convention controversy. You may be familiar with the "Parking Lot Patriots" of the 2012 Oklahoma GOP State Convention. This report is from a part of that group, and they are pressing their complaint based on violations of various rules and laws. Relevant links, including the actual complaint are here: http://www.okliberty.com/documents