I get this with phatch, no picture traited : I don't know anything about ; is it the same subject ? like in
https://bugs.launchpad.net/phatch/+bug/1156583
?
(I hope not to do anyone in lauchnpad waste time)

~$ phatch
Traceback (most recent call last):
  File "/usr/share/phatch/phatch/lib/pyWx/folderFileBrowser.py", line 246, in on_list_item_selected
    self.show_preview(filename)
  File "/usr/share/phatch/phatch/lib/pyWx/folderFileBrowser.py", line 236, in show_preview
    bitmap = pil_wxBitmap(open_thumb(filename, size=(128,128)))
  File "/usr/share/phatch/phatch/lib/openImage.py", line 94, in open_thumb
    save_cache=save_cache)
  File "/usr/share/phatch/phatch/lib/thumbnail.py", line 428, in open
    size=size, save_cache=save_cache)
  File "/usr/share/phatch/phatch/lib/thumbnail.py", line 206, in _open
    image = open_image(filename)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 87, in open_image_exif_thumb
    return open_image_exif(uri)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 74, in open_image_exif
    return imtools.transpose_exif(open(uri))
  File "/usr/share/phatch/phatch/lib/openImage.py", line 44, in open
    image = open_image_without_pil(uri, WITHOUT_PIL)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 115, in open_image_without_pil
    image = open_method(filename)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 350, in open_xcf
    return open_image_with_command(filename, command, 'xcf2png')
  File "/usr/share/phatch/phatch/lib/openImage.py", line 152, in open_image_with_command
    image = Image.open(temp_file)
  File "/usr/share/phatch/phatch/lib/Image.py", line 2020, in open
    raise IOError("cannot identify image file")
IOError: cannot identify image file
Traceback (most recent call last):
  File "/usr/share/phatch/phatch/lib/pyWx/folderFileBrowser.py", line 246, in on_list_item_selected
    self.show_preview(filename)
  File "/usr/share/phatch/phatch/lib/pyWx/folderFileBrowser.py", line 236, in show_preview
    bitmap = pil_wxBitmap(open_thumb(filename, size=(128,128)))
  File "/usr/share/phatch/phatch/lib/openImage.py", line 94, in open_thumb
    save_cache=save_cache)
  File "/usr/share/phatch/phatch/lib/thumbnail.py", line 428, in open
    size=size, save_cache=save_cache)
  File "/usr/share/phatch/phatch/lib/thumbnail.py", line 206, in _open
    image = open_image(filename)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 87, in open_image_exif_thumb
    return open_image_exif(uri)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 74, in open_image_exif
    return imtools.transpose_exif(open(uri))
  File "/usr/share/phatch/phatch/lib/openImage.py", line 44, in open
    image = open_image_without_pil(uri, WITHOUT_PIL)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 115, in open_image_without_pil
    image = open_method(filename)
  File "/usr/share/phatch/phatch/lib/openImage.py", line 350, in open_xcf
    return open_image_with_command(filename, command, 'xcf2png')
  File "/usr/share/phatch/phatch/lib/openImage.py", line 152, in open_image_with_command
    image = Image.open(temp_file)
  File "/usr/share/phatch/phatch/lib/Image.py", line 2020, in open
    raise IOError("cannot identify image file")
IOError: cannot identify image file