I had the same bug on xubuntu distribution.
The solution: start your livecd, choose "try ubuntu without installing"
Once the office to open the terminal and remove the package ubiquity-slideshow-xubuntu:
sudo apt-get remove ubiquity-slideshow-xubuntu
You can then start the installation by clicking on the icon located on the desktop
I had the same bug on xubuntu distribution. slideshow- xubuntu:
The solution: start your livecd, choose "try ubuntu without installing"
Once the office to open the terminal and remove the package ubiquity-
sudo apt-get remove ubiquity- slideshow- xubuntu
You can then start the installation by clicking on the icon located on the desktop
Enjoy :)