amoTools

It's a bug in TinyMCE editor. With the following patch the editor is working correctly:

Open file /plugins/editors/tinymce.php
Search for:

 function onSave($editor) {
         return 'if (tinyMCE.get("'.$editor.'").isHidden()) {tinyMCE.get("'.$editor.'").show()}; tinyMCE.get("'.$editor.'").save();';

an change it to:

 function onSave($editor) {
         return 'if (tinyMCE.get(\''.$editor.'\').isHidden()) {tinyMCE.get(\''.$editor.'\').show()}; tinyMCE.get(\''.$editor.'\').save();';

(replacing all " with \' will correct the bug)