I have a problem with thumbnails on my Ubuntu 12.04 LTS 32-bit system with Cinnamon 2.0.14 DE and Nemo 2.08.
I have tried removing the
~/.thumbnails directory but it is not working for me. This is very weird because when I open an image in Eye of GNOME, Nemo is creating thumbnails but other images doesn't have preview thumbnails as one can see in my screenshots below. I have changed the preview settings as show miniatures always.