moneo@vince:~$ beryl-settings
Traceback (most recent call last):
  File "/usr/bin/beryl-settings", line 1948, in ?
    MakeCategoryArea(Category)
  File "/usr/bin/beryl-settings", line 1723, in MakeCategoryArea
    CatBasePixbuf = gdk.pixbuf_new_from_file_at_size("%s/%s"%(BaseDir,CatImages[Category.Name]),IconSize,IconSize)
gobject.GError: Unrecognized image file format