Another update.
1. added instructions to create the content-repository-content-files dir in the serverroot
2. new instructions on creating a /graphics dir in the global-pageroot and copying the graphics in dotlrn/www/graphics there. This is a workaround for the bug that non-dotlrn (including non-logged-in) users cannot see the default dotlrn header graphics.
To upgrade your dotlrn installation just follow the instructions marked "(NEW! June 30)" on the dotlrn installation page.
Thanks to Harry Neuwirth for first reporting this issue.