Swedish media reports that CVR was found and damaged but BEA are in the process of salvaging it and rumours has it that there might be some data released from it as early as today (CET).
Reading through all pages this far, it would be likely that a surprising rapid decompression took place and the flight crew wasn't able to react in proper time.
Four things that bothers me.
1) That -14000 feet glitch. It just reminds me of Valuejet and the exploding tyre.
2) No comms from the cockpit whatsoever. O2 supply not working?
3) Controlled descent, most likely initiated from the cockpit.
4) Maintenance the day before. Many bad things have happened when maintenance have forgot even the smallest thing, like the turn of a knob (Helios).