I am running Fusion 6.0.1 and OS X 10.9 anticipated GM release. I have noticed an issue that I have not found a solution for. When viewing a VM full-screen (Windows VMs are the only ones tested thus far) the auto-hiding menu bar at the top hides spontaneously in about two seconds. The only thing to prevent this from happening is to quickly select the menu/option that you are seeking. If not selected in two seconds the menu disappears, requiring one to move the cursor down and then return to the top of the screen to make the menu reappear, and try again.
Does anyone know if this is a 10.9 specific issue, or is a 6.0.x issue? I will try to test it on 10.8.5 and see what happens when I get some additional time.
Thank you