Description:
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 Since today (2004-03-30), we experience a calculation error when using strtotime("-1 month") to get previous month date. Maybe this error is due to the fact that 2004 is a bissextile year. The last bissextile year was 1996.

Reproduce code:
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 The actual computer date must be 2004-03-30.

<?
  print strftime("%Y-%m-%d", strtotime("-1 month"))."\n";
?>

Expected result:
----------------
2004-02-29

Actual result:
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2004-03-01