Using the following code with the month of October (any year), generates an endless loop; all other months are fine. 

<?
     $dtDate = ("10/01/00");
     $nMonth = ("10");

     do {
          // Build a calendar table
          $dtDate = (date("m/d/y", (strtotime($dtDate) + 86400)));
     } while (date("m", strtotime($dtDate)) == $nMonth);
 ?>


I am using PHP 4.0.2 and Apache 1.3.12 under MS Windows 98 SE. I have tested this script using Linux, Apache and PHP3 and it executes OK for all months.