Issues with the floating dropdown boxes

I found an issue with the floating drop-down boxes ( font,font size...), if we have more than one CKEDITOR in a page. The drop-downs are getting loaded properly for the first editor we clicked, after that it will work for that particular editor only, For other editors on the same page a script error is emitted while clicking on the drop-down boxes.Please post a workaround/fix for this issue.

Thanks,
Prabhakaran.