Index: trunk/install/php/foltialib.php
===================================================================
--- trunk/install/php/foltialib.php (リビジョン 75)
+++ trunk/install/php/foltialib.php (リビジョン 84)
@@ -30,5 +30,5 @@
 		escape_string($value);
 		htmlspecialchars($value);
-		$value = ereg_replace("[^0-9]", "", $value);
+		$value = ereg_replace("[^-0-9]", "", $value);
 		$value = escape_numeric($value);
 	return ($value);