Comment 5 for bug 989968

From http://forum.ubuntu-fr.org/viewtopic.php?id=914271 .
It does help, when you first boot as live CD and then remove ubiquity-slideshow-(xubuntu) packadge. you can do it from live session bu opening terminal and typing there: sudo apt-get remove ubiquity-slideshow-xubuntu. Instead of "xubuntu" use your distro name.

I did this on Lubuntu 12.04 and then started the installation from desktop icon and this time it went smoothly.