Apple are on a roll with software releases as this week sees the second beta of iOS 10.3.2 and macOS 10.12.5. The company also released the second betas of watchOS 3.2.2 and tvOS 10.2.1 to round off a series of updates that bring a number of minor bug fixes and security improvements.
One of the most notable fixes included in iOS 10.3.2 is the issue experienced with third-party VPN apps but Apple also warn that with this release Siri text responses may be incomplete. Apple is yet to indicate just what features iOS 10.3.2 may bring but given the small release number it is likely a maintenance fix.
It also seems that iOS 10.3.2 removes support for 32-bit devices such as the iPhone 5 and 5C and only includes support for 64-bit mobile processors.
As for the remaining software updates, macOS 10.12.5, watchOS 3.2.2, and tvOS 10.2.1 appear to lack any release notes and appear to be just maintenance releases to fix under-the-hood bugs rather than any major feature releases.
Registered developers can download the second iOS 10.3.2 beta from the Apple Developer Center or can grab it over-the-air with the proper configuration profile installed. These releases are intended for developers to ready their apps before the software update is released to the general public so expect various bugs and instability with these releases. You can always downgrade from iOS 10.3.2 to iOS 10.3.1 if you got curious but decided against it.