He went in freefall last winter when he had his whirlwind romance with Bruni, and a bump this summer with his whirlwind of diplomatic activity (with the war in Georgia, notably).
This is an average of 9 polls, from here In the long run, we're all dead. John Maynard Keynes
As soon as they started talking politics they lost huge numbers and the popularity of the government surged. Peak oil is not an energy crisis. It is a liquid fuel crisis.