Just found this forum otherwise I'd have been posting about my broken switch on the 6th September.
Having only received it two days before, I'd inserted my memory cards (SD & MS both pre-loaded with PDF books in eager anticipation) and started a Stephen King short story. After about 90 minutes total reading use I was underwhelmed to find that the darn thing no longer turned on and off!
I wound up sending it off to Sony for repair (gotten attached to the serial number plus it looked like it was going to be the quickest option as it was the first few days of the UK launch).
The switch is now fixed & still working (panicing looks around for wood to knock on
)
Just got other 'issues' that I'm searvhing for solutions for (best get looking deeper on the forum then)
Chris