Description:
------------
Using a form with input name like name="foo[]" this is what is returned for files:

$_FILES = array(1) {
  ["foo"]=>
  array(5) {
    ["name"]=>
    array(2) {
      [0]=>
      string(0) ""
      [1]=>
      string(0) ""
    }
    ["type"]=>
    array(2) {
      [0]=>
      string(0) ""
      [1]=>
      string(0) ""
    }
[...snip...]
  }
}

Expected:

$_FILES = array(1) {
  ["foo"]=>
  array(2) {
    [0]=>
    array(5) {
      [name]=>
      string(0) ""
      [type]=>
      string(0) ""
[...snip...]
    }
    [1]=>
    array(5) {
      [0]=>
      string(0) ""
      [1]=>
      string(0) ""
[...snip...]
    }
  }
}

This being highly unintuitive, though in a bug report from 2002 closed as "won't change", should be documented.