Found out there is a bug in comments.css
Got to line 511 where you will find
#social .social-comment-body {
font-size: 14px;
line-height: 18px;
overflow: hidden;
/**
* @workaround Prevent ugly overflow issues in IE6
* @valid yes
* @affected IE6
*/
width: 100%;
}
Nice try to tell IE6 to be a good boy … but newer browsers don’t like this. Change the lines as follows:
#social .social-comment-body {
font-size: 14px;
line-height: 18px;
overflow: hidden;
}
* html #social .social-comment-body { /**
* @workaround Prevent ugly overflow issues in IE6
* @valid yes
* @affected IE6
*/
width: 100%;
}
This will force only IE6 to use the width-attribute.
Hope it helps.