Sources: Raiders knew mission a one-shot deal - Navy News | News from Afghanistan & Iraq - Navy Times:
"U.S. officials believe Pakistani intelligence continues to support militants who attack U.S. troops in Afghanistan, and actively undermine U.S. intelligence operations to go after al-Qaida inside Pakistan. The level of distrust is such that keeping Pakistan in the dark was a major factor in planning the raid, and led to using the high-tech but sometimes unpredictable helicopter technology that nearly unhinged the mission.

Pakistan’s government has since condemned the action, and threatened to open fire if U.S. forces enter again."

Finally, a more coherent and plausible "official" story.

via Robot Wisdom