Sortable.serialize('toArray') contain the placeholder item

[doutu]

<ul id="test"> <li id="i_1">item 1</li>

<li id="i_2">item 2</li>

<li id="i_3">item 3</li>

<li id="i_4">item 4</li> </ul>

$("#test").Sortable.serialize("toArray") will return an empty item id which is the placeholder. If this is a bug, please fix it. If not, why don't remove this empty id item when serializes.

[paul]

Fixed in r3110