Logged In: YES 
user_id=57486

The diffs look cool but if the to and from lines are
identical an exception is thrown:

  File "<string>", line 23, in makeDiff
  File "c:\_dev\rx4rdf\rx\htmldiff.py", line 1687, in make_file
    summary=summary))
  File "c:\_dev\rx4rdf\rx\htmldiff.py", line 1741, in make_table
    if not diff_flags[0]:
IndexError: list index out of range

(This is on python 2.3.3 -- I renamed your difflib.py to
htmldiff.py and put it in site-packages)

Perhaps you should add the case of two identical files to
test_difflib.py.

thanks