nate, my instructions are for system wide for kvm(qemu) not vbox.
when i look at your config file that you posted there is "ServerAliveCountMax=5". i've had looked at all the man files that i can think of and can't find anything like that. don't know if it's a vbox command or what. yet it seems suspicious to me. since i only have one user on each vm i don't really have to worry about the perms on the files. sorry couldn't help more em
