Description:
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Running a test where I generate a time in timezone, and read back fails for timezones with two / characters, as in:

America/Argentina/ComodRivadavi


Reproduce code:
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foreach($timezones as $tz) {
  date_default_timezone_set($tz);
  $st=date('M j, Y H:i:s T',$t);
  $rt = ParseTTime($st);
  if ($rt == $t) echo " OK "; else echo " PROBLEM $rt parse: "; echo ($rt-$t)/3600;
}

Expected result:
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Should work like other sites in the timezones array

Actual result:
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Fatal error: Uncaught exception 'Exception' with message 'DateTimeZone::__construct() [<a href='function.DateTimeZone---construct'>function.DateTimeZone---construct</a>]: Unknown or bad timezone (America/Argentina/ComodRivadavi)'