[jQuery] jQuery Interface Sortable: loosing the style of dragged item

[jQuery] jQuery Interface Sortable: loosing the style of dragged item


Hi,
I'm quite a newbie and I'm using jQuery 1.12 and interface 1.2
(interface.eyecon.ro) and I have a strange behavior on my sortable
elements : the divs I drag have no style applied to, the style comes
back when I stop dragging them.
Here's my code :
$('#ph_columns td.sortable').Sortable(
        {
            accept: 'portlet',
            helperclass: 'ph_sort_placeholder',
            handle: 'div.portlet-header',
            opacity: 0.9,
            tolerance: 'intersect'
        }
);
Can you see someting wring here ? Here the divs of class 'portlet'
will see the corresponding css style not be displayed when dragged.
Thanks in advance for your help :)