Using 3.01D and individual entry archives. I love that the filenames are now based on the entry subject, however..
I started off using a self-developed php-based blogging script. I imported the data to MT when I started using it about a year ago. My old data has no subjects with the entries, so there hundreds upon hundreds of entries that do not contain subjects.
I would assume there should be some type of fallback if the subject is null or empty? Otherwise all but my last few hundred entries are broken on the search results page, as the links point at /archives/2002/04/.php (no filename).