Has anybody else got an e mail saying they've been selected to preview future updates for the xbox one?
If it's anything like the Xbox 360 betas, don't do it. I signed up to them and usually ended up regretting it, although that was largely down to having to download updates every other time I turned the console on (presumably not necessary now). They don't pay attention to your feedback either unless it's some huge issue, I complained various times about some quite obvious audio interference that occurs on the dashboard and it was never acknowledged.