In "Global settings" (/admin/content/nodewords) I've checked 2 vocabularies in option "Auto-keywords vocabularies".
In ContentType settings (/admin/content/node-type/mycontenttype) I've disabled "Allow editing of meta tags" to be sure to use "Global settings". All options in "Automatic creation options" are empty (radion button also) as I've never filled them in ContentType settings.
Viewing a node page of mines, keywords are filled with default ones. But vocabularies are not present.
Why ? Want did I missed ?