I can just point out that html2lrf_options and html2epub_options are no longer valid. You should use new flag conversion_option like this:
Code:
conversion_options = { 'tags' :'aa,bb'
, 'publisher' : 'pub'
, 'comments' : 'desc'
, 'language' : 'en'
, 'linearize_tables' : True
}