At December 20 VMware released many new releases of current software. VMware vCenter Server 5.1.0b has been released.
The release has mainly bug fixes. Also two new improvements:
- Timeout errors occurring when logging in to the vSphere Client have been addressed.
- You can log in to a vSphere Web Client as a user of an Active Directory domain that has a non-standard UPN.
Release Notes are here.