Apple has posted VPN Update for Mavericks Server (http://tinyurl.com/k8fdhml). The update addresses an issue that prevented users from connecting to VPN services using Layer 2 Tunneling Protocol, or L2TP. It requires Mac OS X 10.9.1 and Server 3.0.1.
If you bought a new Mac Pro, Apple has released Mac Pro EFI Firmware Update 2.0 (http://tinyurl.com/ko7a9vf). This update improves system reliability during reboot, resolves an issue with memory self-test, and improves graphics power management when using Boot Camp.