JQuery UI draggable element leaves weird traces in Chrome
Finally I have a working workaround .
Just using outline: 1px solid transparent; on the div fixes the problem :)
It's an anti-aliasing issue.
Its a crome redraw bug
http://blog.andrewcantino.com/blog/2012/02/15/fixing-the-chrome-background-refresh-bug/
have a look on this may be you will get your sloution.