General:
SteamVR status window can now be minimized (with setting to minimize to tray).
Fixed a bug preventing HMD system button presses from being recognized.
Compositor:
Initial asynchronous reprojection support.*
Fixed blue fringing or flashing at the periphery reported by some users.
Fix for right eye occasionally showing left image in some rare cases.
Added dome projection controls for compositor background images.
Vive-specific:
Added night-mode (activate using button in dashboard settings).
Bluetooth driver install now uses force option to fix broken installs.
Updated vivelink.exe (v1.0.49.0) and vivebtdriver.exe (v12.0.1.102).
Vivelink - Fixed 4 digit BT driver version query problem.
Vivelink - Improved BLE connect reliability.
ViveBTDriver - Auto recover BT driver when BT USB stuck.
ViveBTDriver - Fix for Win8.1 WU update problem.
* Notes on async reprojection:
Requires Nvidia driver version 372.54 or newer.
AMD not supported in this version.
Can be disabled in SteamVR settings under Performance by unchecking "Allow asynchronous reprojection".
Current status is listed in the lower left section of SteamVR Settings (Async Reprojection On/Off). If you have "Allow asynchronous reprojection" checked, but are still seeing Async Reprojection Off on the left, this means it is not supported on your current setup - see above for requirements.
Frame timing graph has been updated to show the number of times each frame has been presented (white line in the stacked cpu graph) and the number of times each frame has been reprojected to a different vsync than originally rendered for (red line on the stacked gpu graph).
"Allow interleaved reprojection" checkbox still applies in async mode. It controls whether the application is dropped to 45hz when not making framerate, or if it is allowed to get further and further behind until a frame winds up getting presented twice. This leads to less positional judder, but that judder is more random (which tends to be more annoying).
If you get an error about missing files after this update, try relaunching Steam.