The Hire, a series of short films produced by BMW (featuring Clive Owen as an unnamed driver of BMW cars who gets involved in various adventures), was originally intended for Internet broadcast. The series proved so popular that BMW eventually put out a few different DVD versions. But Forrest Whitaker had a clause in his contract that stated that the segment he appeared in ("The Follow", directed by Wong Kar Wai and also featuring Mickey Rourke and supermodel Adriana Lima) would only be distributed on the Internet, so some DVDs lacked that segment. Anyone wanting a complete DVD (and you should, as "The Follow" is one of the best in the series) is advised to be cautious in purchasing it.
Cassandra Clare deleted The Draco Trilogy after she became a published author. "Bootleg" copies can still be found in some corners the Internet, though latter chapters are particularly elusive.
The Essential Kriegsaffe #9 has gone missing since the site it was hosted on shut down.