It appears that Beta 4 no longer remembers the window position of VMs under some conditions. I'm running on a MacBook Pro whose screen resolution is 1440x900. (I keep my Dock on the left edge of the screen.) My guest VM's resolution is 1280x800. When it's running, the window is just a bit taller than the screen (i.e., the bottom of the bottom toolbar is cutoff). I suspend the VM and quit Parallels. When I relaunch, the VM's window is now centered on the screen instead of positioned in the upper left where I left it.