I am trying to understand why IE 7>10 is showing a black border on a submit button. In order to clear it, I have to click inside the fieldset and then it goes away. But comes back when I click send or cancel. Is this a common problem with IE? I have included screenshot. Thanks!

css code
.submit
        {
        margin:-50px 0 0 -148px;
        background-color:#eee;
        height:40px;
        width:120px;
        padding:0;
        border:1px solid #666;
        color:#42A0FF;
        }
.cancel
        {
        margin: -51px 0 0 -20px;
        background-color:#eee;
        height:40px;
        width:120px;
        padding:0;
        border:1px solid #666;
        color:#42A0FF;
        }
fieldset
        {
        background:#f2f2e6;
        border-color:#cccccc #cccccc #cccccc #cccccc;
        margin:10px 0 46px -150px;
        width:404px;
        display:block;
        text-height:10px;
        padding-bottom:15px;
        }