For my own notes: There is a new Gnome3 thumbnailer described at http://askubuntu.com/questions/199110/how-can-i-instruct-nautilus-to-pre-generate-thumbnails/201997#201997
For my own notes: There is a new Gnome3 thumbnailer described at http:// askubuntu. com/questions/ 199110/ how-can- i-instruct- nautilus- to-pre- generate- thumbnails/ 201997# 201997