code: def _already_resized_on_fb(self,fn,pid,_megapixels):
          
          logger.debug("%s - resize requested"%(fn))
          # Get width/height from fb
          width_fb,height_fb=self._getphoto_originalsize(pid)
          # Now compute what image will be if we resize it
          new_width,new_height=pusher_utils.resize_compute_width_height(\
                  fn,_megapixels)
          logger.debug("%s - fb %d/%d, current %d/%d"\
                  %(fn,width_fb,height_fb,new_width,new_height))
          # Check both cases since FB sometimes rotates photos
          if width_fb==new_width and height_fb==new_height:
              return True
          elif width_fb==new_height and height_fb==new_width:
              return True
  
          return False
docs: Checks if image file (fn) with photo_id (pid) has already
          been resized on fb. If so, returns True