- The performance of Xen guests in 32-bit domains is improved.
- The maximum amount of disks that can be attached to a Xen guest has been increased from 100 to 256.
- The time needed to boot Xen guests is reduced.
- Xen guests now support up to 4 serial ports.
- xz compression support is now available in Xen PyGrub.
- CD-ROM emulation in KVM is improved.
- Live migration convergence speed is improved.
- Issues with the boot order of virtual machines have been fixed.