Closed Issue: DragPanel performance. Drag and Drop is getting very slow with 15 DragPanels on the page. [11490]

I noticed that Drag & Drop performance is degradating as the number of DragPanels on the page increases.
Drag & Drop feature becomes totally unusable with more than 15 DragPanels on the page.

This issue exists only when using Internet Explorer and there is no such performance hit in Firefox.

Please use attached .aspx pages to verify.