Comment 7 for bug 713838

Paolo, you need to right click Applications the select "Edit Menus". In the resulting window, select Graphics on the left side and then on the right side, right click gThumb Photo Import Tool. Select Properties and in the resulting window, change the command in the "Command" box to read:
sh -c 'gphoto2 ; exec gthumb --import-photos'
It's easiest to just blank out the old command and paste in the one I wrote above.
Once the new command is in the box, just click "Close" and close out of the menu editor.

If your camera is already connected, disconnect it. Then the next time you plug it in and set it to upload, everything should work as before. Some of the choices in the new version of the import tool have been moved to the "Preferences" button, so look at that once it runs.