Windows Insiders on the Fast ring received build 16281 last night. It’s the third build in a week and like the previous several builds it focuses solely on quality and doesn’t add any new features.

“As we mentioned in last week, we are now at the point of the development cycle for the Windows 10 Fall Creators Update where our focus is now on stabilization for release to the world,” Microsoft’s Dona Sarkar reiterates. “This means that we are releasing new builds to Insiders more quickly and that these builds will include mostly bug fixes. You’ll notice that this build continues to include a bunch of good bug fixes Insiders will enjoy.”

Here’s Microsoft’s list of fixes.

• We fixed an issue resulting in Train Simulator 2017 failing to launch on recent flights.
• We fixed an issue resulting in not being able to tab into an open PDF in Microsoft Edge after interacting with the any of the Microsoft Edge window elements using [a] mouse.
• We fixed an issue where the Windows Defender Security Center app icon was missing in taskbar when the app was open, as well in Start’s all apps list. You will also notice that the icon is now un-plated in the taskbar.
• We’ve made some adjustments to address an issue resulting in sudden and brief CPU spikes where you couldn’t move your mouse. If you’ve encountered this, please try it in this new build and let us know if your experience has improved.
• We fixed an issue where minimized app windows on mixed-DPI monitor setups might end up drawing offscreen after your PC resumed from sleep.
• We fixed an issue where if you changed your display language preference to something other than the machine’s default then [sic] any app which did not take an update while also getting the updated language resource package from the Store would end up continuing to display its tile in Start in that default language rather than the new language displayed within the app and other system UI.

There is no corresponding list of known issues, which is irresponsible and, I think, a way for Microsoft to hide the fact that the initial shipping version the Fall Creators Update will ship with a laundry list of problems that will be fixed, silently or not, later.