Microsoft hasn't released a new Windows 10 build since the Anniversary Update's RTM - build 14393 - over three weeks ago, until now. Today, the company released Windows 10 for PCs build 14901, the first Redstone 2 build.
In an article on the Feedback Hub on Tuesday, Microsoft promised that the first Redstone 2 builds would not contain much in the way of new features, but instead would contain improvements to OneCore. The company made good on that promise, but there are some known issues to be aware of.
Here are the known issues in Windows 10 for PCs build 14901:
Support for kernel debugging over 1394 has been removed, but will be available in an upcoming kit release. A work-around will be posted to the Debugging Tools for Windows Blog shortly.
Adobe Acrobat Reader crashes when you try to launch it.
As you can see, there isn't much to worry about. To grab this build, you'll need to be on the Fast ring. To do that, go to Settings -> Update & security -> Windows Insider Program, and set it to receive Insider builds. Once your PC restarts, go back and make sure you're in the Fast ring. Once you're configured, you can grab it through Windows Update.