<!DOCTYPE HTML>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>opera border radius</title>
<style type="text/css">
img{
border-radius:10px;
-o-border-radius:10px;
}
</style>
</head>
<body>
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Bonsai_IMG_6426.jpg/450px-Bonsai_IMG_6426.jpg" width="337" height="450" alt="my think">
</body>
Opera doesn’t like adding border-radius to images directly — Opera is stubborn like that.
For a solution that works in Opera, check out http://www.komodomedia.com/blog/2010/10/border-radius-rounded-images-and-avatars/
Also, put the real CSS rule
border-radiusafter the vendor-prefixed rule-o-border-radius.