This is a maintenance release. The following items were fixed and/or added:
* VMM: guest SMP stability fixes
* VMM: fixed guru meditation with nested paging and SMP guests (bug #5222)
* VMM: changed VT-x/AMD-V usage to detect other active hypervisors; necessary for e.g. Windows 7 XP compatibility mode (Windows & Mac OS X hosts only; bug #4239)
* VMM: guru meditation during SCO OpenServer installation and reboot (VT-x only; bug #5164)
* VMM: fixed accessed bit handling in certain cases (bug #5248)
* VMM: fixed VPID flushing (VT-x only)
* VMM: fixed broken nested paging for 64 bits guests on 32 bits hosts (AMD-V only; bug #5285)
* VMM: fixed loading of old saved states/snapshots (bug #3984)