This is a maintenance release. The following items were fixed and/or added:
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VMM: fixed emulation of certain instructions for 64-bit guests on 32-bit hosts
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VMM: properly handle certain MSRs for 64-bit guests on ancient CPUs without VT-x support for MSR bitmaps (bug #13886)
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GUI: fixed a crash with multimonitor setups under certain conditions
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GUI: allow cloning of snapshots when the VM is running
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NVMe: fixed compatibility with the Storage Performance Development Kit (SPDK, bug #16368)
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VBoxSVC: fixed a crash under rare circumstances
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VBoxManage: added a sanity check to modifymedium --resize to prevent users from resizing their hard disk from 1GB to 1PB (bug #16311)
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Windows hosts: another fix for recent Windows 10 hosts
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Linux hosts: Linux 4.10 fixes
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Linux Additions: fixed protocol error during certain operations on shared folders (bug #8463)