Those perms added to DocContributors group in the HomePage :
tiki_p_edit
Can edit pages DocContributors
tiki_p_minor
Can save as minor edit DocContributors
tiki_p_upload_picture
Can upload pictures to wiki pages DocContributors
To enable new people from tw.o forums willing to help and fix issues in doc.tw.o, and without the needed perms to do so.