HOW TO GET IT:
If your console is in Instant-On mode and you were selected to receive the update, it will download and install the update and reboot to standby.
NOTE: Once the update is available to you (today a majority of Preview users will receive this update but a small group will not), you can manually begin the update by navigating to Settings > System and selecting System Update.
If your console has been selected to receive the update and hasnt downloaded and installed the update by 1:00AM PST 2/14/2016, you will be prompted to do so at that time.
DETAILS:
OS version released: th2_xb_rel_1602.160210-2122
Available: 6:00PM PST 2/12 (2:00AM GMT 13/2)
Fixes:
Game DVR. Fixed an issue in which game clips would sometimes reappear after being deleted.
Parties. Fixed an issue which could cause users to be removed from a party with no notification after sharing content or launching profile selection.
http://forums.xbox.com/xbox_early_a...review_forums/nxoe_1602/f/5578/t/2120592.aspx
(This link will only work for preview members)