An interesting new development is being reported. A division, lead by Russia seems to be taking shape in the Quartet's stance on the new Palestinian Unity Government. Since the formation of a new Palestinian government lead by Hamas, the Quartet- made up of the US, EU, UN and Russia- agreed to not recognize the PA until three requirements were met, the ceasing of all violence, the recognition of Israel and recognizing all past agreements between the PLO and Israel. None of these conditions have ever been applied by Israel, much less expected of it.
Here a worthwhile editorial about the Mecca Agreement.