JQuery 1.4.4 & JQuery UI 1.8.6 Selectable helper: 'clone' not working for a table object

JQuery 1.4.4 & JQuery UI 1.8.6 Selectable helper: 'clone' not working for a table object

JQuery 1.4.4 & JQuery UI 1.8.6 Selectable helper: 'clone' not working for a table object. I have a HTML table with rows and data. Selectable is working OK, but helper: 'clone' is not working. When I start dragging, the original row immediately disappears, no matter what I put as a helper value. I even created a custom helper function which explicitly clones the current row, but with no result.

I ended up creating a workaround like adding start: 'start' and setting up the function like this:

var start = function(e, tr)
{
     tr.item.show();
}

Please, tell me your opinion on this subject.