If you are on Windows 10 desktop, you'll want to check for an app update in the Store. The Windows Camera app is updated version 2015.1078.40.
As usual, there is no changelog. However, early reports suggest it fixes an intermittent problem that some new Surface owners (Book, Pro 4) were experiencing. Some users could not snap a photo with the rear (world-facing) camera. They could tap to focus but not grab the photo. Tonight's update reportedly fixes this issue making it rather significant.
We should also mention that Messaging + Skype is updated as well for those on Windows 10 Insider Preview. That app is now at version 1.10.28004.0, although we have not gone through it for changes yet.
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