// Change what's hidden by default
add_filter('default_hidden_meta_boxes', 'hide_meta_lock', 10, 2);
function hide_meta_lock($hidden, $screen) {
	if ( 'frog' == $screen->base )
		$hidden = array('postexcerpt','slugdiv','postcustom','trackbacksdiv', 'commentstatusdiv', 'commentsdiv', 'authordiv', 'revisionsdiv');
		// removed 'postexcerpt',
	return $hidden;
}