Error fetching TAZ Digiabo

[BaronThoran]

Since a couple of Versions i'm not able to fetch and import the german TAZ epub. Importing the manually download epub works without any problem.

I get the following error:

ERROR: Konvertierungsfehler: <b>Misslungen</b>: Nachrichten abrufen von Taz Digiabo

Nachrichten abrufen von Taz Digiabo
Resolved conversion options
calibre version: 0.7.17
{'asciiize': False,
'author_sort': None,
'authors': None,
'base_font_size': 0,
'book_producer': None,
'change_justification': 'original',
'chapter': None,
'chapter_mark': 'pagebreak',
'comments': None,
'cover': None,
'debug_pipeline': None,
'disable_font_rescaling': False,
'dont_download_recipe': False,
'dont_split_on_page_breaks': True,
'extra_css': None,
'extract_to': None,
'flow_size': 260,
'font_size_mapping': None,
'footer_regex': '(?i)(?<=<hr>)((\\s*<a name=\\d+></a>((<img.+?>)*<br>\\s*)?\\d+<br>\\s*.*?\\s*)|(\\s* <a name=\\d+></a>((<img.+?>)*<br>\\s*)?.*?<br>\\s*\\d+))(?=<br>)' ,
'header_regex': '(?i)(?<=<hr>)((\\s*<a name=\\d+></a>((<img.+?>)*<br>\\s*)?\\d+<br>\\s*.*?\\s*)|(\\s* <a name=\\d+></a>((<img.+?>)*<br>\\s*)?.*?<br>\\s*\\d+))(?=<br>)' ,
'input_encoding': None,
'input_profile': <calibre.customize.profiles.InputProfile object at 0xa68364c>,
'insert_blank_line': False,
'insert_metadata': False,
'isbn': None,
'keep_ligatures': False,
'language': None,
'level1_toc': None,
'level2_toc': None,
'level3_toc': None,
'line_height': 0,
'linearize_tables': False,
'lrf': False,
'margin_bottom': 5.0,
'margin_left': 5.0,
'margin_right': 5.0,
'margin_top': 5.0,
'max_toc_links': 50,
'no_chapters_in_toc': False,
'no_default_epub_cover': False,
'no_inline_navbars': False,
'no_svg_cover': False,
'output_profile': <calibre.customize.profiles.OutputProfile object at 0xa683bec>,
'page_breaks_before': None,
'password': 'mzyyoq',
'prefer_metadata_cover': False,
'preprocess_html': False,
'preserve_cover_aspect_ratio': False,
'pretty_print': True,
'pubdate': None,
'publisher': None,
'rating': None,
'read_metadata_from_opf': None,
'remove_first_image': False,
'remove_footer': False,
'remove_header': False,
'remove_paragraph_spacing': False,
'remove_paragraph_spacing_indent_size': 1.5,
'series': None,
'series_index': None,
'tags': None,
'test': False,
'timestamp': None,
'title': None,
'title_sort': None,
'toc_filter': None,
'toc_threshold': 6,
'use_auto_toc': False,
'username': '103889',
'verbose': 2}
InputFormatPlugin: Recipe Input running
Parsing all content...
Traceback (most recent call last):
File "/tmp/init.py", line 48, in <module>
File "/home/kovid/build/calibre/src/calibre/utils/ipc/worker.py", line 99, in main
File "/home/kovid/build/calibre/src/calibre/gui2/convert/gui_conversion.py", line 24, in gui_convert
File "/home/kovid/build/calibre/src/calibre/ebooks/conversion/plumber.py", line 824, in run
File "/home/kovid/build/calibre/src/calibre/ebooks/conversion/plumber.py", line 951, in create_oebbook
File "/home/kovid/build/calibre/src/calibre/ebooks/oeb/reader.py", line 71, in __call__
File "/home/kovid/build/calibre/src/calibre/ebooks/oeb/reader.py", line 103, in _read_opf
File "/home/kovid/build/calibre/src/calibre/ebooks/oeb/base.py", line 424, in read
File "/home/kovid/build/calibre/src/calibre/startup.py", line 102, in my_join
File "/usr/lib/python2.6/posixpath.py", line 65, in join
if b.startswith('/'):
AttributeError: 'NoneType' object has no attribute 'startswith'