I've installed the 64 bit version on a Windows 2008 R2 server sdtandard ed. that runs as a virtual machine on a vmware vsphere 4.1 ESXi server using Administrative privileges.
It seems to be always in read only mode, i.e. I see the screen (a little slow update, but anyway no probs) but neither mouse, nor keyboard work.
I've tried setting up two different password, one for VNC password and one for VNC read only passwords, but the behavior is the same.
Ciao and thanks