I have installed latest version, with ckeditor 3.6.1 (released on 16th June 2011) installed into sites/all/libraries dir.
Into "editor appearance" I've selected "Plugin for inserting Drupal teaser and page breaks. (buttons: DrupalBreak, DrupalPageBreak)" but these specific buttons don't appear as I edit a content and an error arises into log:
is_dir() [function.is-dir]: open_basedir restriction in effect. File(/) is not within the allowed path(s): (/:/tmp:/usr:/bin) in //sites/all/modules/ckeditor/includes/ckeditor.lib.inc alla riga 365.