strange behavior for draggable inside fixed position parent

[scottgonzalez]

When dragging an element that is inside an element that has position: fixed, there is a strange re-drawing problem for the parent element.

See ​http://www.scottsplayground.com/temp/drag_fixed_container/ for an example. Drag the yellow div to the left of the purple div to see the problem.

[scott.gonzal]

Tested in Firefox, IE, Opera and Safari on Windows. The flickering only occurs in Firefox.

[scott.gonzal]

If using a clone or ghosting, this can be avoided by appending the helper to the body: $('#drag').draggable({

ghosting: true, appendTo: document.body

});

[paul]

Cannot reproduce it on FF Mac, but I can reproduce it with FF Win. This means it's definitely a rendering issue within the OS/Browser, and unfortunately unfixable for us. Thanks anyway!