As well as released a new Windows 10 Mobile build today Microsoft have released build 10576 of Windows 10 for Windows Insiders on the fast ring. With this build Microsoft have update the media casting feature of Edge so that you can now cast videos from Youtube and other services to a DLNA media player (not protected content like Netflix). You can also cast photos and music to DLNA devices from the browser. When I tested this in earlier builds I had very limited success so I will be trying it again once I get the new build up and running.

Other changes include Cortana inside PDFs in Edge and an updated Xbox app. There is still the issue with small screen devices blue screening during the upgrade so I know my Linx 7 won’t be able to upgraded. Considering how close we must be to the general release of the Threshold 2 release its disappointing to still have upgrade issues.

Look out for a hands on video tomorrow.

Here are the issues in this release (via Microsoft):

To continue receiving missed call notifications and send texts from Cortana, you will need to be on this build and higher. We’ve made a change that improves this experience that requires newer builds.

When notifications pop up from Action Center, any audio playing (like music from Groove, or videos from the Movies & TV app) gets reduced by 75% for a period of time.

After upgrading to this build, all your Skype messages and contacts are gone in the Messaging app. The workaround for this is to navigate to C:\Users\<USERNAME>\AppData\Local\Packages\Microsoft.Messaging_8wekyb3d8bbwe\LocalCache in File Explorer and either delete or rename the “PrivateTransportId” file. Then restart the Messaging app. Additionally, you can install the app from the Store as an updated app.

Small form-factor devices, like the Dell Venue 8 Pro, that boot with rotation or virtual mode screen size set larger than the physical screen size will experience a bluescreen on upgrade and will roll back to the previous build.

After upgrading to this build, the power button on your Surface Pro 3 may no longer put your Surface Pro 3 to sleep and instead shut down.

WebM and VP9 have been temporarily removed from builds. We continue to develop a VP9 implementation that we intend to ship in Windows. Expect VP9 to return soon in a future build.

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