Problem with retrieval of ZenPencils

[SylvainDe]

$ python comicbookmaker.py -c zenpencils
zenpencils : about to update
[<img alt="196. The Can-do girl" src="http://cdn.zenpencils.com/wp-content/uploads/can_do_girl2.jpg" title="196. The Can-do girl"/>]
zenpencils : nothing new
Traceback (most recent call last):
  File "comicbookmaker.py", line 88, in <module>
    main()
  File "comicbookmaker.py", line 63, in main
    com.update()
  File "/home/josay/Geekage/Comics/ComicBookMaker/comic_abstract.py", line 179, in update
    for comic in cls.get_next_comic(comics[-1] if comics else None):
  File "/home/josay/Geekage/Comics/ComicBookMaker/comics.py", line 104, in get_next_comic
    comic = cls.get_comic_info(soup, next_comic)
  File "/home/josay/Geekage/Comics/ComicBookMaker/comics.py", line 528, in get_comic_info
    assert all(i['alt'] == i['title'] == "" for i in imgs)
AssertionError