Index: wp-admin/includes/post.php
===================================================================
--- wp-admin/includes/post.php	(revision 17961)
+++ wp-admin/includes/post.php	(working copy)
@@ -1495,7 +1495,7 @@
 	}
 
 	if ( $teeny ) {
-		$mce_buttons = apply_filters( 'teeny_mce_buttons', array('bold, italic, underline, blockquote, separator, strikethrough, bullist, numlist,justifyleft, justifycenter, justifyright, undo, redo, link, unlink, fullscreen') );
+		$mce_buttons = apply_filters( 'teeny_mce_buttons', array('bold, italic, underline, blockquote, separator, strikethrough, bullist, numlist,justifyleft, justifycenter, justifyright, undo, redo, link, unlink') );
 		$mce_buttons = implode($mce_buttons, ',');
 		$mce_buttons_2 = $mce_buttons_3 = $mce_buttons_4 = '';
 	} else {