Index: update-core.php
===================================================================
--- update-core.php	(revision 12431)
+++ update-core.php	(working copy)
@@ -219,17 +219,19 @@
 
 	@set_time_limit( 300 );
 
-	$php_version   = phpversion();
-	$php_compat    = version_compare( $php_version, '4.3', '>=' );
-	$mysql_version = $wpdb->db_version();
-	$mysql_compat  = version_compare( $mysql_version, '4.1.2', '>=' ) || file_exists( WP_CONTENT_DIR . '/db.php' );
+	$php_required   = '4.3';
+	$mysql_required = '4.1.2';
+	$php_version    = phpversion();
+	$mysql_version  = $wpdb->db_version();
+	$php_compat     = version_compare( $php_version, $php_required, '>=' );
+	$mysql_compat   = version_compare( $mysql_version, $mysql_required, '>=' ) || file_exists( WP_CONTENT_DIR . '/db.php' );
 
 	if ( !$mysql_compat && !$php_compat )
-		return new WP_Error( 'php_mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress requires PHP version 4.3 or higher and MySQL version 4.1.2 or higher. You are running PHP version %1$s and MySQL version %2$s.'), $php_version, $mysql_version ) );
+		return new WP_Error( 'php_mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress requires PHP version %1$s or higher and MySQL version %2$s or higher. You are running PHP version %3$s and MySQL version %4$s.'), $php_required, $mysql_required, $php_version, $mysql_version ) );
 	elseif ( !$php_compat )
-		return new WP_Error( 'php_not_compatible', sprintf( __('The update cannot be installed because WordPress requires PHP version 4.3 or higher. You are running version %s.'), $php_version ) );
+		return new WP_Error( 'php_not_compatible', sprintf( __('The update cannot be installed because WordPress requires PHP version %1$s or higher. You are running version %2$s.'), $php_required, $php_version ) );
 	elseif ( !$mysql_compat )
-		return new WP_Error( 'mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress requires MySQL version 4.1.2 or higher. You are running version %s.'), $mysql_version ) );
+		return new WP_Error( 'mysql_not_compatible', sprintf( __('The update cannot be installed because WordPress requires MySQL version %1$s or higher. You are running version %2$s.'), $mysql_required, $mysql_version ) );
 
 	// Sanity check the unzipped distribution
 	apply_filters('update_feedback', __('Verifying the unpacked files'));