VirtualBox 4.2.6 (released 2012-12-19)
This is a maintenance release. The following items were fixed and/or added:

• VMM: don´t inject stale VT-x events to prevent crashes after VM reset (bug #11256)
  
• VMM: workaround for buggy BIOSes which enable MONITOR only for certain CPUs (bugs #9460, #10686)
  
• GUI: fixed trimming of anti-aliased text in details-view element headers (4.2.0 regression)
  
• GUI: fixed create-settings-file-alias functionality on Mac hosts (4.2.0 regression)
  
• GUI: fixed take-guest-screenshot functionality on Windows hosts (bug #11095)
  
• GUI: several minor fixes, including palette fixes (bug #11191)
  
• GUI: fixed Windows 2012 OS type (bug #11206)
  
• GUI: allow to terminate the VM even if VBoxSVC crashed
  
• API: fixed cancelling of snapshots, previously this could lead to inconsistent VM configs (bug #6877)
  
• API: fixed identifying disk images by UUID (bug #11209)
  
• 3D Support: several fixes
  
• VRDP: fixed occasional crash with external authentication (bug #11156)
  
• VGA: fix for double scan text modes
  
• USB: fixed invalid pending request count at the time of service of DEVICE POWER requests (Windows hosts only; bugs #10021, #11056)
  
• USB keyboard: Korean keyboard workaround (bug #11150)
  
• Storage: fixed hang with QCOW images and asynchronous I/O enabled
  
• Storage: fixed hang with newer VHD images (bug #11279)
  
• Storage: actually write the non-rotational flag to the VM settings (4.2.0 regression)
  
• Virtio-net: fixed the problem with network statistics counters in Session Information dialog (GUI)
  
• Metrics: introduced network rate and disk usage metrics
  
• Metrics: fixed a crash under certain conditions on Solaris hosts
  
• BIOS: fix for El Torito
  
• Shared Folders: if the host folder of a shared folder mapping does not exist, keep it active but mark it as invalid to prevent inconsitent saved states (bug #11147)
  
• VBoxManage: fixed converting disks from raw images
  
• VBoxManage: show snapshot description in the VM or snapshot information
  
• VBoxManage: make implicit opening of media consistent in all places dealing with media
  
• VBoxManage: the iSCSI initiator name was not stored in the settings file when doing storageattach (bug #11212)
  
• VBoxManage: metrics collect now properly handles ´CPU/MHz´ and ´Net/*/LinkSpeed´ metrics
  
• VBoxManage: changing the image UUID or parent UUID as part of storageattach works now in all safe cases
  
• VBoxManage: introduced storageattach --medium additions as a shortcut to mount the additions image (bug #11165)
  
• OVF: fixed importing OVF files cerated by recent VMware products (bug #10905)
  
• Linux hosts / Bridged Networking: fixed the problem with leaking connections in conntrack (bug #11178)
  
• Linux Additions: added support for ConsoleKit sessions in the vminfo service of VBoxService
  
• Linux Additions: don´t crash during remount under certain conditions (bug #11291)
  
• Linux/Solaris Additions: fixed guest memory metrics collection
  
• Solaris hosts: added a dependency to ensure that the user directories are reachable when starting VBox services
  
• Windows host installer: integrated user-contributed translations, thanks to all contributors!
  
• Windows Additions: fixed auto-logon installation for Windows 8
  
• Windows Additions: don´t fail if the shared folders host service is not available
  
• Windows Additions: fixed Guest Additions startup on Windows 2000 guests (bug #11253)
  
• Windows Additions: auto-resize fixes for Windows 8 guests