Apple just seeded iOS 8.4.1 beta 1 to members of its developer program. Seeing that this release is a minor version release, there’s a good chance that it contains bug fixes, and perhaps even a fix for the exploits used in the iOS 8.3 and iOS 8.4 jailbreaks.
While details are currently scarce about what the update contains—there are no release notes at this time—we’ll be sure to update you once we gather more info.
The iOS 8.4.1 beta 1 release comes in with a build number of 12H304, and is available for all devices capable of running iOS 8.4.
If you’re a jailbreaker, you’d be advised to stay away from this beta release, although you can almost certainly downgrade back to iOS 8.4 if the need happened to arise.
This update comes along at the same time as the OS X 10.10.5 beta for the Mac. You can find this update and the OS X update on the Apple Developer Center.