Hello,
I upgraded recently from Virtualbox 4.2 to 4.3.6 on Openmediavault 0.5 , but now I have no remote control option anymore in the Phpvirtualbox menu. I choose Openmediavault precisely over other NAS solutions for this feature. If this is some serious problem I wouldn't upgrade to 4.3 right now.
Here are some screenshots:
Thanks
alf