unfortunately Debian hasn't a 0.12 yet, so I don't know
if this bug is already fixed, sorry.
I had some pictures in a directory and used gthumb to
lock through them. Then I moved them to another
directory and copied some other picture to this
directory from my digicam. I started gthumb to have a
look on them, but gthumb showed me the thumbnails of
the old pictures, not of the new ones. A click on
refresh did nothing and I haven't found a method to get
the correct thumbnails.