I was getting a blank screen (out of sync) on booting from the live cd. I worked around the problem as follows:
* At install screen press F6 and select nomodeset and install Ubuntu as usual.
* On first boot after install, press e on getting the GRUB bootloader.
* Using arrow keys navigate to and delete quiet and splash and type the word nomodeset in their place
* Press Ctrl and X to boot
* You should now be able to login to your Ubuntu as usual
For those of you who do not know what to do next, in the taskbar click on System->Administration->Hardware drivers, and select and activate the nvidia current driver if you have an nvidia card like I do. The driver will be downloaded and activated automatically, and you will be prompted for a reboot.