Index: wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js
===================================================================
--- wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js	(revision 23116)
+++ wp-includes/js/tinymce/plugins/wordpress/editor_plugin_src.js	(working copy)
@@ -135,22 +135,76 @@
 				}
 			});
 
-			// Add obsolete HTML attributes that are still in use.
+			// Add obsolete HTML elements and attributes that are still in use.
 			ed.onPreInit.add(function(ed) {
-				// The commonAttr are from TinyMCE 3.5.7 getHTML5()
-				// Obsolete attributes are from TinyMCE 3.5.7 getHTML4()
+				// Tags and attributes from TinyMCE 3.5.8 getHTML4() and getHTML5()
 				var commonAttr = 'id|accesskey|class|dir|draggable|item|hidden|itemprop|role|spellcheck|style|subject|title|onclick|ondblclick|onmousedown|onmouseup|onmouseover|onmousemove|onmouseout|onkeypress|onkeydown|onkeyup',
-					tdAttr = commonAttr + '|abbr|axis|headers|scope|rowspan|colspan|char|charoff|align|valign|halign|nowrap|bgcolor|width|height';
-				// Obsolete table attributes
-				ed.schema.addValidElements('table['+commonAttr+'|summary|width|border|frame|rules|cellspacing|cellpadding|align|bgcolor]');
-				// Obsolete tr attributes
-				ed.schema.addValidElements('tr['+commonAttr+'|align|char|charoff|valign|halign|bgcolor]');
-				// Obsolete td and th attributes
-				ed.schema.addValidElements('td['+tdAttr+'],th['+tdAttr+']');
-				// Adds "name" for <a>
-				ed.schema.addValidElements('a['+commonAttr+'|href|target|ping|rel|media|type|name]');
-				// Extend <object> and <embed>
-				ed.schema.addValidElements('object[*],param[id|name|value|valuetype|type],embed[*]');
+					tdAttr = commonAttr + '|abbr|axis|headers|scope|rowspan|colspan|char|charoff|align|valign|halign|nowrap|bgcolor|width|height',
+					html4Attr = 'id|class|style|title|lang|xml::lang|dir|onclick|ondblclick|onmousedown|onmouseup|onmouseover|onmousemove|onmouseout|onkeypress|onkeydown|onkeyup';
+
+				ed.schema.addValidElements(
+					// HTML 4.0 tags that are obsolete in HTML 5.0
+					'applet[id|class|style|title|codebase|archive|code|object|alt|name|width|height|align|hspace|vspace],' +
+					'tt['+html4Attr+'],' +
+					'u['+html4Attr+'],' +
+					's['+html4Attr+'],' +
+					'strike['+html4Attr+'],' +
+					'big['+html4Attr+'],' +
+					'font[id|class|style|title|lang|xml::lang|dir|size|color|face],' +
+					'basefont[id|size|color|face],' +
+					'acronym['+html4Attr+'],' +
+					'dir['+html4Attr+'|compact],' +
+					'center['+html4Attr+'],' +
+					'noframes['+html4Attr+'],' +
+					'isindex[id|class|style|title|lang|xml::lang|dir|prompt],' +
+
+					// HTML 4.0 attributes that are obsolete in HTML 5.0
+					'table['+commonAttr+'|summary|width|border|frame|rules|cellspacing|cellpadding|align|bgcolor],' +
+					'thead['+commonAttr+'|align|char|charoff|valign],' +
+					'tfoot['+commonAttr+'|align|char|charoff|valign],' +
+					'tbody['+commonAttr+'|align|char|charoff|valign],' +
+					'tr['+commonAttr+'|align|char|charoff|valign|halign|bgcolor],' +
+					'td['+tdAttr+'],' +
+					'th['+tdAttr+'],' +
+					'p['+commonAttr+'|align],' +
+					'a['+commonAttr+'|href|target|ping|rel|media|type' + '|tabindex|onfocus|onblur|charset|name|hreflang|rev|shape|coords],' +
+					'br['+commonAttr+'|clear],' +
+					'h1['+commonAttr+'|align],' +
+					'h2['+commonAttr+'|align],' +
+					'h3['+commonAttr+'|align],' +
+					'h4['+commonAttr+'|align],' +
+					'h5['+commonAttr+'|align],' +
+					'h6['+commonAttr+'|align],' +
+					'img['+commonAttr+'|alt|src|height|width|usemap|ismap' + '|name|longdesc|align|border|hspace|vspace],' +
+					'iframe['+commonAttr+'|name|src|height|width|sandbox|seamless' + '|longdesc|frameborder|marginwidth|marginheight|scrolling|align],' +
+					'input['+commonAttr+'|type|accept|alt|autocomplete|autofocus|checked|disabled|form|formaction|formenctype|formmethod|formnovalidate|formtarget|height|list|max|maxlength|min|' +
+						'multiple|pattern|placeholder|readonly|required|size|src|step|width|files|value|name' + '|tabindex|onfocus|onblur|usemap|onselect|onchange|align],' +
+					'select['+commonAttr+'|autofocus|disabled|form|multiple|name|size' + '|tabindex|onfocus|onblur|onchange],' +
+					'textarea['+commonAttr+'|autofocus|disabled|form|maxlength|name|placeholder|readonly|required|rows|cols|wrap' + '|tabindex|onfocus|onblur|onselect|onchange],' +
+					'label['+commonAttr+'|form|for' + '|onfocus|onblur],' +
+					'button['+commonAttr+'|autofocus|disabled|form|formaction|formenctype|formmethod|formnovalidate|formtarget|name|value|type' + '|tabindex|onfocus|onblur],' +
+					'div['+commonAttr+'|align],' +
+					'ul['+commonAttr+'|type|compact],' +
+					'ol['+commonAttr+'|start|reversed' + '|type|compact],' +
+					'li['+commonAttr+'|value' + '|type],' +
+					'dl['+commonAttr+'|compact],' +
+					'menu['+commonAttr+'|type|label' + '|compact],' +
+					'pre['+commonAttr+'|width|xml:space],' +
+					'hr['+commonAttr+'|align|noshade|size|width],' +
+					'legend['+commonAttr+'|align],' +
+					'caption['+commonAttr+'|align],' +
+					'col['+commonAttr+'|span' + '|width|align|char|charoff|valign],' +
+					'colgroup['+commonAttr+'|span' + '|width|align|char|charoff|valign],' +
+					'form['+commonAttr+'|accept-charset|action|autocomplete|enctype|method|name|novalidate|target' + '|onsubmit|onreset|accept],' +
+					'area['+commonAttr+'|shape|coords|href|alt|target|media|rel|ping|type' + '|tabindex|onfocus|onblur|nohref],' +
+					'body['+commonAttr+'|onload|onunload|background|bgcolor|text|link|vlink|alink],' +
+
+					// Extended <object> and <embed>
+					'object[*],' +
+					'param[id|name|value|valuetype|type],' +
+					'embed[*]'
+				);
+
 				ed.schema.addValidChildren('object[*]');
 			});