We’ve included many reliability improvements in Nuuksio especially targeting Email, Calendar synchronisation and VPN settings. In addition to reliability improvements, the Email app now has enhanced support for handling HTML formatted messages. Audio routing for Android apps has been improved on Android app support 8.1, fixing issues with applications such as WhatsApp calls and Youtube. The operating system now supports hardware MPEG2, VP9 and h.265/HEVC video decoding (the exact support depends on the device).
The detailed release notes are also available.