[/img]Today Microsoft released a new update to the Xbox One system software for preview members, focused on fixing issues with the newly introduced backwards compatibility feature (that will be publicly released during the holidays).
Here are the patch notes, posted on the private preview forums by Program Manager Emily Hanson:
OS version released: xb_rel_1507.150621-2200
Available: 6:00PM PT 6/24 (2AM GMT 25/6)
Fix for an issue preventing users from Twitch Streaming Backward Compatibility titles.
Fix to address issues with Matchmaking in Backward Compatibility multiplayer titles.
As usual, if you’re not part of the preview program, but would like to be, you can mention it in the comments (including your gamertag), and another reader might be able to send you an invite.
Just remember that this is a beta testing program, so you understand and accept the responsibility for any issues caused to your console, since preview members do it to make the launch of each patch smoother for everyone else, and not just to get a sneak peek on future updates.