Does IE10, too, have this IE9 bug?

Frank

New Member
I discovered a most peculiar behavior by IE9. Try this code:

HTML:
<!DOCTYPE HTML>
<html>
<head>
    <title>Demo IE9 border-radius bug</title>
    <meta charset="windows-1252" />
<style>
html, body {
    margin: 0;
    padding: 0;
}
#main-container {
    position: relative;
    width: 500px;
    height: 600px;
    margin: 0 auto;
}
#article {
    position: absolute;
    width: 500px;
    height: 600px;
    overflow-y: hidden;     /* variable 1: setting it to 'visible' or deleting it cures */
    border-radius: 10px;    /* variable 2: deleting it cures */
    background: pink;
}
#title-bar {
    position: fixed;        /* variable 3: setting it to 'absolute' cures */
    width: 400px;
    height: 50px;
    margin-left: 50px;
    background: black;
}
</style>
</head>
<body>
    <div id="main-container">
        <div id="article">
            <div id="title-bar"></div>
        </div>
    </div>
</body>
</html>
The title bar is clipped and is given a (one) rounded corner. Switch to IE8 and 7, and see that they do not have the problem. Which makes me think that it is caused by the border-radius, which wasn't supported before IE9.

I have a few questions as well:
  1. Does IE10, too, have this bug? (Don't have 10 yet.)
  2. Has anyone seen it described before?
  3. Does anyone have an address where IE bug reports can be filed *and* where actually something is done with them?
 
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