Microsoft today announced the release of a new Windows 10 build for PCs and mobile for people participating in the fast ring of the Windows Insider Program.

Build 14379 comes just two days after build 14376. The velocity of new preview versions of Windows 10 is just slightly lower than it was last week, when Microsoft released two builds in two days.

Microsoft has been working on the big Anniversary Update that’s due out on August 2, so it’s no surprise that this build doesn’t come with a lot of new things — it’s mainly about bug fixes.

For example, now the Action Center won’t crash after you dismiss a bunch of notifications, Dona Sarkar, a software engineer in Microsoft’s Windows and Devices Group, wrote in a blog post. Also, launches of Project Centennial applications from the Start menu and Cortana will now be taken into consideration for the calculation of which apps should be shown in the “Most used” section of the start menu, Sarkar wrote. (See the blog post for descriptions of the other two bug fixes.)

There’s just one known issue in this build: “Using Continuum from your phone on your PC via the Connect app will not work,” Sarkar wrote. That should be ironed out in the next build, she added.

If you want to try the new previews but you’re not a Windows Insider, you can sign up here.