Index: wp-includes/class-wp-editor.php
===================================================================
--- wp-includes/class-wp-editor.php	(revision 19429)
+++ wp-includes/class-wp-editor.php	(working copy)
@@ -38,13 +38,11 @@
 			'editor_class' => '', // add extra class(es) to the editor textarea
 			'teeny' => false, // output the minimal editor config used in Press This
 			'dfw' => false, // replace the default fullscreen with DFW (needs specific DOM elements and css)
-			'tinymce' => null, // load TinyMCE, can be used to pass settings directly to TinyMCE using an array()
+			'tinymce' => true, // load TinyMCE, can be used to pass settings directly to TinyMCE using an array()
 			'quicktags' => true // load Quicktags, can be used to pass settings directly to Quicktags using an array()
 		) );
 
-		if ( null === $set['tinymce'] )
-			self::$this_tinymce = user_can_richedit();
-		else
+		if ( $set['tinymce'] && user_can_richedit() )
 			self::$this_tinymce = (bool) $set['tinymce'];
 
 		self::$this_quicktags = (bool) $set['quicktags'];
Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 19429)
+++ wp-includes/general-template.php	(working copy)
@@ -1749,10 +1749,10 @@
 function user_can_richedit() {
 	global $wp_rich_edit, $is_gecko, $is_opera, $is_safari, $is_chrome, $is_iphone, $is_IE;
 
-	if ( !isset( $wp_rich_edit) ) {
+	if ( !isset($wp_rich_edit) ) {
 		$wp_rich_edit = false;
 
-		if ( get_user_option( 'rich_editing' ) == 'true' ) {
+		if ( get_user_option( 'rich_editing' ) == 'true' || !is_user_logged_in() ) { // default to 'true' for logged out users
 			if ( $is_safari ) {
 				if ( !$is_iphone || ( preg_match( '!AppleWebKit/(\d+)!', $_SERVER['HTTP_USER_AGENT'], $match ) && intval($match[1]) >= 534 ) )
 					$wp_rich_edit = true;