This is a maintenance release. The following items were fixed and/or added:

VMM: improved support for certain Intel Atom CPUs (bug #14773)
VMM: system register emulation fix (5.0 regression; bug #14515)
GUI: fixed immediate screenshot issue (bug #14108)
GUI: fixed another 3D overlay window reparenting issue when the VM is switched to fullscreen mode on X11 hosts
GUI: fixed help index (bug #14722)
GUI: fixed state synchronization issue in the VM manager window when VM was paused from its runtime window
Audio: fixed suspending/resuming audio streams on VM pause/unpause (bug #14784)
Audio: properly reset AC97 audio streams, otherwise there is silence until a non-48 kHz stream is played
Audio: fixed a small emulation quirk of the AD1980 codec of the HDA device to make recent linux guests work (bug #14653)
USB: serveral fixes for the xHCI controller
USB: fixed a crash under certain conditions on hosts with Linux kernels older than version 3.3
USB: better identification of certain USB devices
NAT: support TCP in DNS proxy (bug #14736)
NAT Network: fixed sporadic crashes on Windows hosts (bug #13899)
API: when creating differencing images (e.g. as part of a snapshot or cloning a VM) use the same disk image variant as the parent image if possible, which means that e.g. a diff image for a VMDK image split into 2 GB files will also be split (bug #14764)
API: event queue handling fixes preventing loss of certain events at runtime (e.g. new webcam attached), particularly important on Mac OS X hosts
Webcam: passthrough fix for certain devices (Windows hosts only)
VBoxManage: don't crash on snapshot restorecurrent / edit if the VM has no snapshots
VBoxManage: don't crash on controlvm addencpassword (bug #14729)
Mac OS X hosts: use the correct kernel on certain hosts
Windows hosts: fixed VRDP external authentication
Windows hosts: allow to use a shared folder path with extended-length path prefix (5.0 regression; bug #14651)
Windows hosts: fix a crash in the netfilter host driver under certain conditions (bug #14799)
Windows host installer: documented and fixed public properties which can be used to control the installation to some extent
Windows host installer: fixed not starting the actual installation when showing the version information or help dialogs
X11 Additions: added basic support for X.Org Server 1.18 (3D requires additional fixes)

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