[eucalyptus]

I've been using Calibre for a bit without any issues. Today, though, I tried to convert a book and received the following error:

ERROR: Conversion Error: <b>Failed</b>: Convert book 1 of 1 ([Songs & Swords 1] Elfshadow)

Convert book 1 of 1 ([Songs & Swords 1] Elfshadow)
Resolved conversion options
calibre version: 0.7.28
{'asciiize': False,
 'author_sort': None,
 'authors': None,
 'base_font_size': 0.0,
 'book_producer': None,
 'change_justification': u'original',
 'chapter': u"//*[((name()='h1' or name()='h2') and re:test(., 'chapter|book|section|part|prologue|epilogue\\s+', 'i')) or @class = 'chapter']",
 'chapter_mark': u'pagebreak',
 'comments': None,
 'cover': None,
 'debug_pipeline': None,
 'disable_font_rescaling': False,
 'dont_split_on_page_breaks': False,
 'extra_css': None,
 'extract_to': None,
 'flow_size': 260,
 'font_size_mapping': None,
 'footer_regex': u'(?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': u'(?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>)',
 'html_unwrap_factor': 0.40000000000000002,
 'input_encoding': None,
 'input_profile': <calibre.customize.profiles.InputProfile object at 0x0416CA70>,
 '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': 0.0,
 'linearize_tables': 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.SonyReader300Output object at 0x0416CE50>,
 'page_breaks_before': u"//*[name()='h1' or name()='h2']",
 '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': 'c:\\docume~1\\imoxyz\\locals~1\\temp\\calibre_0.7.28_tmp_xxkmpb\\calibre_0.7.28_p2svbt.opf',
 '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,
 'smarten_punctuation': False,
 'tags': None,
 'timestamp': None,
 'title': None,
 'title_sort': None,
 'toc_filter': None,
 'toc_threshold': 6,
 'use_auto_toc': False,
 'verbose': 2}
InputFormatPlugin: RTF Input running
on C:\Documents and Settings\Imoxyz\My Documents\Books\Calibre ePub Books\Elaine Cunningham\[Songs & Swords 1] Elfshadow (87)\[Songs & Swords 1] Elfshadow - Elaine Cunningham.rtf
Converting RTF to XML...
	Preprocessing to convert unicode characters
Python function terminated unexpectedly
  This RTF file has a feature calibre does not support. Convert it to HTML first and then try it.
no map found
map is "ansicpg874"
 (Error Code: 1)
Traceback (most recent call last):
  File "site.py", line 103, in main
  File "site.py", line 85, in run_entry_point
  File "site-packages\calibre\utils\ipc\worker.py", line 107, in main
  File "site-packages\calibre\gui2\convert\gui_conversion.py", line 24, in gui_convert
  File "site-packages\calibre\ebooks\conversion\plumber.py", line 836, in run
  File "site-packages\calibre\customize\conversion.py", line 216, in __call__
  File "site-packages\calibre\ebooks\rtf\input.py", line 197, in convert
ValueError: This RTF file has a feature calibre does not support. Convert it to HTML first and then try it.
no map found
map is "ansicpg874"

I'm using version 7.28 (the latest one as of this posting).