Hi,
Thanks for your elaborate job in preparing the v5.22 of the User’s Guide.
According to the web page http://root.cern.ch/drupal/content/users-guide, v5.21 is dated 19-May-2009, but it seems to be the release date of v5.22.
Also, it seems to me that the contents of its (v5.21) “See changes” link ftp://root.cern.ch/root/doc/revhis_5_21.pdf are “Changes in v5.22 (May 2009)”, not “Version 5.21 changes (May 2009)”.
Well, I may be misunderstanding something…
Yours,
Kazuyoshi