The professional mathematicans on sci.math are slightly sceptical about this:
The same [proof]? or a new one?
De Branges has often claimed to have proved the Riemann hypothesis before. However, he did play an important role in the proof of the Bieberbach conjecture, so there is at least the possibility that this is a correct proof.
I am not completely convinced that it is useful for the mainstream (non-mathematical) media to report such things so credulously. It is quite likely that De Branges is wrong, and therefore it might have been better to hold the story until other mathematicians had actually read his new preprints.
More news on this can be found here.