The first was a press release by the Palestinian Foreign Ministry saying that US actions were themselves "obstacles to peace" and that the US was not an honest broker in the negotiations.
The second was the Palestinian Arab delegation walking out during Hillary Clinton's speech at the UNHRC in Geneva.
There have been others, and Palestinian Media Watch caught them.
Mahmoud Abbas, January 24:
The US is assisting us in the amount of $460 million annually. This does not mean that they dictate to us whatever they want, because we do what we view as beneficial to our cause. I recall that they said, 'Don't go to the Arab Summit in Damascus,' but we went. They demanded that we should not sign the Egyptian reconciliation document [between Fatah and Hamas], but we sent Azzam Al-Ahmed to sign it.
Fatah's Jibril Rajoub said:
The American administration has chosen unilateral aggression against human rights.
PMW brings many editorials from the official PA media as well that is sharply critical of the US.
Yet these insults, which go way beyond the diplomatic pale and should be reserved for countries like Libya and Iran, have been ignored by the media that is emotionally invested in blaming Israeli intransigence alone for lack of progress in peace negotiations.
(h/t David G for reminding me of the PMW article.)