Chrome jquery .animate() leaves 'movement' lines

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I have a div, so that when I click, it will toggle to expand, or retract. It works pretty well on all browsers, though there is a thing that intrigues me. On Google Chrome when it retracts it leaves small lines from the movement. www.rezoluz.com/login.php - The page

To see it, open that page with Google Chrome. And click on the register button twice, on the second time it will leave lines, normally, but not on other browsers. I'm using a standard .animate, with jquery. All help is greatly appreciated.

SCREENSHOT:

See the lines beneath

Also, here is a jsfiddle showing the result : http://jsfiddle.net/rwQPu/2/ . Error in Chrome 21.0.1180.81 beta-m Win7.

2 Answers
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