Index: templates/default/js/reply.js
===================================================================
--- templates/default/js/reply.js	(revision 858991)
+++ templates/default/js/reply.js	(working copy)
@@ -16,6 +16,13 @@
 		}
 
 		reply.parentNode.insertBefore(respond);
+				
+		if( (typeof( tinymce ) !== 'undefined') && tinyMCE.getInstanceById('bbp_reply_content') ){
+        	tinyMCE.execCommand('mceFocus', false, 'bbp_reply_content');
+        	tinyMCE.execCommand('mceRemoveControl', false, 'bbp_reply_content');
+			tinyMCE.execCommand('mceAddControl', false, 'bbp_reply_content');
+		}
+		
 		if ( post && postId )
 			post.value = postId;
 		parent.value = parentId;