I'm saying that Sarkozy has networks of influence in the mainstream media that he has built over the years - by personal friendship with big media bosses like Martin Bouygues (TF1) and Arnaud Lagardère (world's N° 1 magazine publisher), and by influence as a top government figure over public broadcasting.

I've discussed this in diaries (see links Jérôme has usefully added above), especially:

11 in a row for Sarko
Roots vs MSM, synthesis?
The Republic of Far Far Away

As for the leftwing or centrist press, it has been under more and more pressure from big money. See:

Le Monde, Journal of Record

and a series on Libération (link goes to third part which contains links to first two parts).

To sum up: Sarko can personally pull a lot of levers in the MSM. What remains of a leftwing (or simply neutral) press is small and shaky.

So when the media tell stories, they tend to serve Sarkozy, or at least not to hurt Sarkozy. And I did find the change in storyline intriguing three weeks ago, when the media stopped running with the "Ségolène is falling out of the sky" narrative. The Canard Enchaîné at the time reported that the Sarko campaign were worried she might really disappear.