I cannot use the "Use all display as full screen" either.
>>I put fusion on it and it's working pretty good at the moment. the only thing that's not working is : " Use all display as full screen"
on Mavericks + Fusion 5.0.3, I could reproduce this issue: could not use all display as full screen. I have submit one internal ticket to fix this issue. and thanks a lot for your reporting and patience.
Best Regards,
changhai