I searched around but did not find this exact issue. I just did a fresh install of Ubuntu Hardy and VBox 1.6.2. When my VM (Vista Enterprise) comes up, I can hit CTRL-Alt-Del and get to the log in screen. But, then nothing will type. I have to click around for about a minute or so. It then starts typing stuff. I have to keep clicking around. If I let it go back to the previous screen, the wait starts all over. The latest Guest Additions is installed. Any help with this? Thanks.
EDIT: I enabled the USB Host Proxy thinking this may be caused by the USB error when I try to view the settings in VBox.