I've got two more things to try:
1) sudo mv /usr/share/live-installer/slideshow/index.html /usr/share/live-installer/slideshow/index.html.bak and then start the live installer
2) run ubiquity --debug
I've got two more things to try:
1) live-installer/ slideshow/ index.html live-installer/ slideshow/ index.html. bak
sudo mv /usr/share/
/usr/share/
and then start the live installer
2)
run ubiquity --debug