Description:
------------
array_unique does not work, when it comes to multidimensional arrays. I've posted the behaviour + a workaround here: http://www.phpdevblog.net/2009/01/using-array-unique-with-multidimensional-arrays.html#comment505

I've also found the (older) bug report #12789, where Jeroen says that array_unique is not supposed to work with multidimensional arrays.

If this is so, you should at least mention it in the documentation (see the older bug report! James says the same thing)

Reproduce code:
---------------
$array = array(
    array(
        'id'    => 123,
        'name'  => 'Some Product',
        'ean'   => '1234567890123'
    ),
    array(
        'id'    => 123,
        'name'  => 'Some Product',
        'ean'   => '4852950174938'
    ),
    array(
        'id'    => 123,
        'name'  => 'Some Product',
        'ean'   => '1234567890123'
    ),
);
$uniqueArray = array_unique($array);
var_dump($uniqueArray);

Expected result:
----------------
array(2) {
  [0]=>
  array(3) {
    ["id"]=>
    int(123)
    ["name"]=>
    string(12) "Some Product"
    ["ean"]=>
    string(13) "1234567890123"
  }
  [1]=>
  array(3) {
    ["id"]=>
    int(123)
    ["name"]=>
    string(12) "Some Product"
    ["ean"]=>
    string(13) "4852950174938"
  }
}

Actual result:
--------------
array(1) {
  [0]=>
  array(3) {
    ["id"]=>
    int(123)
    ["name"]=>
    string(12) "Some Product"
    ["ean"]=>
    string(13) "1234567890123"
  }
}