My situation with gThumb has cleared. Either it was the installation of the latest Ubuntu kernel 2.6.31-15 and/or the fact thtat I had erased all the pictures on my memory card and was able to successfully import new images.
My situation with gThumb has cleared. Either it was the installation of the latest Ubuntu kernel 2.6.31-15 and/or the fact thtat I had erased all the pictures on my memory card and was able to successfully import new images.