Virtualbox 4.3.20 crashes FreeBSD 11.0-CURRENT

[Ranjan1018 .]

*Just upgrade  emulators/virtualbox-ose-4.3.20 via pkg upgrade. Starting a
VM, Windows XP or Ubuntu x86, after few seconds the laptop freezes.The
system responds only to power off, pressing the power button for few
seconds. The only things I can do is a photo of the screen:
https://plus.google.com/112995826906094353410/posts/6amoaitgP8e
<https://plus.google.com/112995826906094353410/posts/6amoaitgP8e>*

*Maurizio*