Let me know if this works, try changing this (near the top of ucan-post-class.php):
<script type="text/javascript">
tinyMCE.init({
mode : "specific_textareas",
theme : "advanced",
skin : "o2k7",
editor_selector:"theEditor",
width:"80%",
theme_advanced_buttons1 : "bold,italic,underline,|,justifyleft,justifycenter,justifyright,fontsizeselect,formatselect",
theme_advanced_buttons2 : "cut,copy,paste,|,bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,image,media",
theme_advanced_buttons3 : "forecolor,backcolor,|,emotions,charmap,spellchecker,|,code,preview,|,help",
theme_advanced_toolbar_location : "top",
theme_advanced_toolbar_align : "left",
plugins : "emotions,preview,safari,spellchecker,media"
});
</script>
To this:
<script type="text/javascript">
tinyMCE.init({
mode : "specific_textareas",
theme : "advanced",
skin : "o2k7",
editor_selector:"theEditor",
width:"80%",
theme_advanced_buttons1 : "bold,italic,underline,|,justifyleft,justifycenter,justifyright,fontsizeselect,formatselect",
theme_advanced_buttons2 : "cut,copy,paste,|,bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,image,media",
theme_advanced_buttons3 : "forecolor,backcolor,|,emotions,charmap,spellchecker,|,code,preview,|,help",
theme_advanced_toolbar_location : "top",
theme_advanced_toolbar_align : "left",
plugins : "emotions,preview,safari,spellchecker,media",
directionality : "rtl"
});
</script>