I'm not sure if this is a support request or bug report, but it's hard to
tell which patterns work with which content types.
For example, on Forum comments pages, the [comment-cid] pattern
doesn't work. Nor does [nid] or [author-name]. What *does* work on
a Drupal Forum page like http://mysite.com/content/some_topic (note, I'm using PathAuto here, so
the Forums path doesn't show up).