API: Fixed an issue when virtual USB mass storage devices or virtual USB DVD drives are added while the VM is not running are by default not marked as hot-pluggable.SDK: Fixed Python bindings incorrectly trying to convert arbitrary byte data into unicode objects with Python 3, causing exceptions (bug #19740).vboximg-mount: Fixed broken write support (bug #20896).ATA: Fixed NT4 guests taking a minute to eject CDs.USB: Fixed rare crashes when detaching a USB device.VGA: Performance improvements for screen updates when VBE banking is used.Recording: Various fixes for settings handling.Audio: General improvements in saved state area.NAT: Prevent issue when host resolver incorrectly returned NXDOMAIN for unsupported queries (bug #20977).GUI: In the storage page of the virtual machine settings dialog, fixed a bug which disrupted mouse interaction with the native file selector on KDE.VMM: Fixed possible Linux guest kernel crash when configuring Speculative Store Bypass for a single vCPU VM.The following items were fixed and/or added: VirtualBox is a community effort backed by a dedicated company: everyone is encouraged to contribute while innotek ensures the product always meets professional quality criteria. VirtualBox is being actively developed with frequent releases and has an ever growing list of features, supported guest operating systems and platforms it runs on. Presently, VirtualBox runs on Windows, Linux and Mac hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7, Windows 8, Windows 10), DOS/Windows 3.x, Linux (2.4, 2.6, 3.x and 4.x), Solaris and OpenSolaris, OS/2, and OpenBSD. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL). VirtualBox is a family of powerful x86 virtualization products for enterprise as well as home use.

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