note 53476 added to function.sprintf

Al utilizar sprintf me encontre con esta novedad: $valor=sprintf("%.2f",63.025); // $valor= 63.02 $valor=sprintf("%.2f",64.025); // $valor= 64.03 ¿Por que en un caso se incrementa el ultimo digito y en el otro no? Si alguien me podria explicar, le quedaria muy agradecido ---- Manual Page -- http://www.php.net/manual/en/function.sprintf.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+53476 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+53476&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+53476&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+53476&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+53476&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+53476&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+53476&report=yes Search -- http://master.php.net/manage/user-notes.php