Description:
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For August 1, 2011, mktime produces different results based on the input format of the month parameter.  Sounds goofy, yes.  
But calculations based on whether the Aug 1 date is in the future or past may fail if a leading zero is entered for the month.



Test script:
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echo 'mktime (0,0,0,8,01,2011)  = '.mktime (0,0,0,8,01,2011). '<br />';
echo 'mktime (0,0,0,08,01,2011)  = '.mktime (0,0,0,08,01,2011). '<br />';
echo 'mktime (0,0,0,7,01,2011)  = '.mktime (0,0,0,7,01,2011). '<br />';
echo 'mktime (0,0,0,07,01,2011)  = '.mktime (0,0,0,07,01,2011). '<br />';

Expected result:
----------------
mktime (0,0,0,8,01,2011) = 1312171200
mktime (0,0,0,08,01,2011) = 1312171200
mktime (0,0,0,7,01,2011) = 1309492800
mktime (0,0,0,07,01,2011) = 1309492800

Actual result:
--------------
mktime (0,0,0,8,01,2011) = 1312171200
mktime (0,0,0,08,01,2011) = 1291179600   <- value is too small
mktime (0,0,0,7,01,2011) = 1309492800
mktime (0,0,0,07,01,2011) = 1309492800