a) set parameter "UseHtmlAreaForRichtextP" in the package parameters of acs-templating to 1
b) set parameter "RichTextEditor" in the package parameters of acs-templating to "xinha", or "ckeditor4" or "tinymce" and install the package "richtext-xinha" and/or richtext-ckeditor4" and/or richtext-tinymce. If these packages are not installed, a warning will appear in the error.log
point (b) is part of the OpenACS 5.9.1 agenda. see http://www.openacs.org/xowiki/openacs-todo
