1) When using vncviewer to remote control a machine running Ubuntu 9.10 x86, I seemingly can’t move nor control windows on the remote host. Solution (helpfully described at http://forums.fedoraforum.org/showthread.php?t=201885) – make sure Visual Effects (i.e. Compiz) are disabled on the remote host.
2) When a VNC session is running in full-screen, how to restore a windowed view? Solution – press F8 to bring up the options menu.