Description:
------------
we just detected a strange behaviour with references and foreach:
after the foreach() is done in the sample code the & disappear in the var_dump for the first two elements, the third is of course still a valid reference because $row exists
i tried to reproduce that effect in different ways but it only happens when using a foreach

Reproduce code:
---------------
<pre><?php
$arr = array(1, 2, 3);
for ($i = 0; $i < count($arr); $i++) {
    $row =& $arr[$i];
    $row = $row * $row;
}
var_dump($arr);

reset ($arr);
while (list(, $value) = each ($arr))
    echo "value: $value\n";

var_dump($arr);

foreach($arr AS $value)
    echo "value: $value\n";

var_dump($arr);
?>

Actual result:
--------------
array(3) {
  [0]=>
  &int(1)
  [1]=>
  &int(4)
  [2]=>
  &int(9)
}
value: 1
value: 4
value: 9
array(3) {
  [0]=>
  &int(1)
  [1]=>
  &int(4)
  [2]=>
  &int(9)
}
value: 1
value: 4
value: 9
array(3) {
  [0]=>
  int(1)
  [1]=>
  int(4)
  [2]=>
  &int(9)
}