Owners of Windows Phone devices can check out a new version of the Windows Phone Recovery Tool, which allows them to reset their phone back to a previous version if needed by connecting it to a Windows PC. The new version number is 2.1.2 and is a mandatory update for the app.
Even though this is a required download, this new version apparently is a pretty minor update. The change log says that this download adds some missing translations, and also includes some "small usability improvements and bug fixes." For those of you who have yet to download the app on your PC, you can go to Microsoft's support page to grab the program.
Thanks to Aakash for the tip!