Баг Opera с анимацией overflow: hidden;

HTML

<div class="aside_map">
<div class="aside_map_frame transitionfix">

		<div class="aside_map_img">			</div>

</div>
</div>

CSS

body {
	background-color: #f3d8ab;
}
.aside_map {
	display: block;
	margin: 25px;
	border-radius: 40px 0px 40px 0px;
	-moz-border-radius: 40px 0px 40px 0px;
	-webkit-border-radius: 40px 0px 40px 0px;
		width: 300px;
	height: 230px;
}
.aside_map_frame {
	width: 100%;
	height: 100%;
	background: transparent;
	background: url('http://365psd.ru/images/backgrounds/wood-texture-009.jpg') #f1c584;		
	border-top: 4px solid #B4811C;
	border-left: 4px solid #B4811C;
	border-bottom: 4px solid #B4811C;
	border-right: 4px solid #B4811C;
	
	border-radius: 35px 0 35px 0;
	-moz-border-radius: 35px 0 35px 0;
	-webkit-border-radius: 35px 0 35px 0;
	z-index: 10;	
	overflow: hidden;
}
.aside_map_img {
	position: relative; 
	background: transparent url('http://posterok.com/photo/big/POK01492_1.jpg') no-repeat scroll center center;
	background-size: cover;
	background-color: #f5eccd;
	min-height: 100%;
	
	-webkit-transition: -webkit-transform 0.4s;
	-moz-transition: -moz-transform 0.4s;
	transition: transform 0.4s;
}
.aside_map_img:hover {
	-webkit-transform: translateY(-50px);
	-moz-transform: translateY(-50px);
	-ms-transform: translateY(-50px);
	transform: translateY(-50px);
}

.transitionfix {
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -webkit-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0)
}