Index: wp-content/themes/twentytwelve/editor-style-rtl.css
===================================================================
--- wp-content/themes/twentytwelve/editor-style-rtl.css	(revision 21483)
+++ wp-content/themes/twentytwelve/editor-style-rtl.css	(working copy)
@@ -8,16 +8,38 @@
 html .mceContentBody {
 	direction: rtl;
 	unicode-bidi: embed;
-	margin: 10px auto;
 }
+
+/* =Headings
+-------------------------------------------------------------- */
+
 li {
 	margin: 0 24px 0 0;
 	margin: 0 1.714285714rem 0 0;
 }
+dl {
+	margin: 0 24px;
+	margin: 0 1.714285714rem;
+}
+.mceContentBody blockquote {
+	font-style: italic !important;
+}
+
+/* =Tables
+-------------------------------------------------------------- */
+
+tr th {
+	text-align: right;
+}
 td {
+	padding: 6px 0 6px 10px;
 	text-align: right;
 }
-.wp-caption-dd {
-	padding-right: 10px;
+
+
+/* =Images
+-------------------------------------------------------------- */
+
+.wp-caption {
 	text-align: right;
 }
\ No newline at end of file