"ckeditor is not defined": no editor showing up and no collapsible fieldsets

Hi,

Maybe this is related to #1201814: Upgrading to 6.x-1.4 fails.

For me it happens with CKEditor 1.4, 1.5 and 1.x-dev (2011-Jun-28); and the library 3.6 and 3.6.1; on Pressflow 6.22.104.

There is no editor showing up in edit node body (ex.: node/123/edit) nor fields in admin sections (ex.: admin/settings/site-information, admin/settings/site-maintenance), nowhere.

Also, the collapsed fieldsets in node/123/edit (like Input format, Menu settings...) are not like a link, so this is not possible to click on them to uncollapse them. Only the title of the fieldsets are visible. The fields themselves are not visible. The vertical_tabs neighter are visible. I tried disabling vertical_tabs and the problems are still there.

Firebug console says:

ckeditor is not defined
[Break On This Error] textarea_settings[add_conf] ...tarea_settings['js_conf'][add_conf]);


I cleared the cache in Drupal (drush cc all) and the cache of my browser Firefox 5.0.

Between each updates of CKEditor, I:
* saved again each profiles pages after the updates (admin/settings/ckeditor/editg, admin/settings/ckeditor/edit/Default, admin/settings/ckeditor/edit/Advanced).
* drush cc all
* drush updatedb
* clear the cache of my browser

When I go back to CKEditor 1.3 (with library 3.6 or 3.6.1), it resolves the issues.