Index: /CKEditor/branches/features/aria/_source/plugins/button/plugin.js
===================================================================
--- /CKEditor/branches/features/aria/_source/plugins/button/plugin.js	(revision 4941)
+++ /CKEditor/branches/features/aria/_source/plugins/button/plugin.js	(revision 4942)
@@ -135,5 +135,5 @@
 			'<span class="cke_button">',
 			'<a id="', id, '"' +
-				' class="', classes, '" href="javascript:void(\'', ( this.title || '' ).replace( "'", '' ), '\')"' +
+				' class="', classes, CKEDITOR.env.ie ? '" href="javascript:void(\''+ ( this.title || '' ).replace( "'"+ '' )+ '\')"' : '',
 				' title="', this.title, '"' +
 				' tabindex="-1"' +
Index: /CKEditor/branches/features/aria/_source/plugins/dialog/plugin.js
===================================================================
--- /CKEditor/branches/features/aria/_source/plugins/dialog/plugin.js	(revision 4941)
+++ /CKEditor/branches/features/aria/_source/plugins/dialog/plugin.js	(revision 4942)
@@ -824,6 +824,6 @@
 						titleHtml,
 						( !!contents.hidden ? ' style="display:none"' : '' ),
-						' id="', tabId, '"' +
-						' href="javascript:void(0)"',
+						' id="', tabId, '"',
+						' tabIndex="-1"',
 						' hidefocus="true"' +
 						' role="tab">',