MobileRead Forums - Spell Check not working at all

Hi,
I have some trouble with spell checking. It does not seem to work for me in any book I tried, even after deleting all config files and with a fresh install. (At some point it did work, but I can't pinpoint when it started to fail. I don't use the option that much.)
I used the build-in dictionaries, but tried to install one from openoffice too, with the same result (failure).

I always get this error message:

Code:

calibre, version 2.30.0

ERROR: Failed to check spelling: Failed to check spelling, click "Show details" for the full error information.



Traceback (most recent call last):

  File "/usr/lib/calibre/calibre/gui2/tweak_book/spell.py", line 1184, in get_words

    words = get_all_words(current_container(), dictionaries.default_locale)

  File "/usr/lib/calibre/calibre/ebooks/oeb/polish/spell.py", line 194, in get_all_words

    read_words_from_opf(root, words, file_name, book_locale)

  File "/usr/lib/calibre/calibre/ebooks/oeb/polish/spell.py", line 124, in read_words_from_opf

    add_words_from_escaped_html(tag.text, words, file_name, tag, 'text', book_locale)

  File "/usr/lib/calibre/calibre/ebooks/oeb/polish/spell.py", line 103, in add_words_from_escaped_html

    root = parse('<html><body><div>%s</div></body></html>' % text, decoder=lambda x:x.decode('utf-8'))

  File "/usr/lib/calibre/calibre/ebooks/oeb/polish/parsing.py", line 671, in parse

    return parse_html5(raw, log=log, line_numbers=line_numbers, linenumber_attribute=linenumber_attribute, replace_entities=False, fix_newlines=False)

  File "/usr/lib/calibre/calibre/ebooks/oeb/polish/parsing.py", line 611, in parse_html5

    parser = HTMLParser(tree=builder, track_positions=line_numbers, namespaceHTMLElements=not discard_namespaces)

TypeError: __init__() got an unexpected keyword argument 'track_positions'

If I ignore the error message I can see on the right side of the spell-checking window: "You have no active user dictionaries. You must choose at least one active user dictionary via Preferences->Editor->Manage spelling dictionaries"
If I go there, the US dictionary is the default for the english language. Under "Manage user dictionaries" exist the "Default" dictionary which is marked as active. I tried adding a new dictionary and marked it active, but that neither worked.
Misspelled words are (correctly) marked in the editor though.

What am I missing??

System is Archlinux/Gnome 3.16.2 and latest kernel.

Ah and the Reports tool failes, too. But I guess thats related to the dictionary problem (at least the error traceback has a dictionary call in it).