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HOW TO GET IT:
• If your console is in Instant-On mode and you have been selected to receive the update, it will download and install the update and reboot to standby.
• NOTE: Once the update is available to you, you can manually begin the update by launching the Guide and navigating to All Settings > System > Updates.
• If your console hasn’t downloaded and installed the update by 1:00 AM PDT 10/8/2017 (8:00AM GMT 8/10), you will be prompted to do so at that time.
• NOTE: This update has a shorter than usual amount of time before it becomes mandatory.

DETAILS:
OS version released: rs3_release_xbox_dev_1710.171006-2000
Available: 6:00PM PDT 10/7 (1:00AM GMT 8/10)

FIXES:

• Party Chat
Further improvements to resolve degraded party chat performance while playing or downloading a game.

• Mixer
Resolved an issue that could cause Mixer to stop streaming under certain conditions.

• Narrator
Fixed an issue that could sometimes cause Narrator to use the default voice instead of the user selected voice.

• Home
Fixed an issue that could cause Home to crash under rare conditions.


KNOWN ISSUES:

• Games & Apps
Game saves may take a long time to sync.
Workaround: Downloading certain game and apps (Minecraft, Netflix, Hulu, etc.) can cause this. Pause the download, then attempt to sync game saves.

• Backgrounds
Setting a background from recent achievement art does not function.

• Tournaments

• The left and right navigation for selecting date and time during Tournament creation is currently reversed when the console language is set to Arabic or Hebrew.
• Left and right navigation in Tournament twists is reversed when the console language is set to Arabic or Hebrew.
• Left and right navigation in the bracket view of Tournaments is reversed when the console language is set to Arabic or Hebrew.

• Sign-in
Text on the account and password sign-in screen in Arabic or Hebrew language may appear aligned on the left instead of the right side.

• Netflix
When using Hebrew language, Netflix fails to launch. A fix for this issue will be available soon.

• Avatars on Home
Users wishing to represent themselves as an avatar can do so by changing their settings under My profile > Customize profile > Show my avatar.

Source: October 7th: New Preview Alpha build available (1710.171006-2000) - XBOX Forums

Posted By: Brink
07 Oct 2017