In 12.04, can the image format for Screenshot be jpeg? I change the file name to save to to be ended with ".jpg", but Gnome image viewer seems not be able to open it saying
Error interpreting JPEG image file (Not a JPEG file: starts with 0x89 0x50)
One example image is here http://dl.dropbox.com/u/13029929/c1p18.jpg Is it a true jpeg image file?
Thanks!


.pngis the only possibility, even inxfce4-screenshooterandscrot. – vasa1 Oct 1 '12 at 13:59