Looks like Francois Zaninotto, one of the core symfony developers, has quit the team. He was largely responsible for the documentation, and co-authored the excellent symfony book, published by Apress.
One of the key successes behind symfony was the documentation. The fact that there was human-readable documentation, and not just an API, was a remarkable thing for an open source project. It’s surely to the detriment of the project that he’s no longer a part of it.
Hopefully he’ll continue to play an active role in the community, and might even consider writing documentation independently of the core team. We’ll just have to see what direction symfony head off in over the next couple of years.