Implements a workaround for adding and updating custom fields in WordPress 3.4.2

fix-custom-fields-in-wp342.php

<?php
/**
 * Plugin Name: Fix Custom Fields in WP 3.4.2
 * Version:     0.0.1
 * Plugin URI:  http://core.trac.wordpress.org/ticket/21829
 * Description: Implements a workaround for adding and updating custom fields in WordPress 3.4.2
 * Author:      
 * Author URI:  
 */

if ( ! function_exists( 'fix_custom_fields_in_wp342' ) ) {
	
	add_action( 'admin_footer-post.php',     'fix_custom_fields_in_wp342' );
	add_action( 'admin_footer-post-new.php', 'fix_custom_fields_in_wp342' );
	
	function fix_custom_fields_in_wp342() {
		
		if ( version_compare( $GLOBALS['wp_version'], '3.4.2', '!=' ) )
			return NULL;
		
		?>
		<script type="text/javascript">
			jQuery(document).delegate( '#addmetasub, #updatemeta', 'hover', function() {
				jQuery(this).attr('id', 'meta-add-submit');
			});
		</script>
		<?php
	}
	
}