Fresh off the press, is an updated version of the Nutanix hypervisor, AHV. Today we released AHV-20160925.43. Features include broader support for the AOS 5.0.x family, and a tech preview feature of hot plugging memory and CPU on VMs. A number of bug fixes were also incorporated. Noteworthy, is a network stack issue that has been fixed. This issue could be experienced by any customer, so upgrading is encouraged.
If you are using AHV, you are encouraged to check out the release notes here. AHV is 1-click upgrade enabled, so you can easily update your cluster in an automated fashion with no VM downtime.