href link not working in ie 8
===

I just can't figure this out. The links below work absolutely fine in every browser except IE8. If you click on the <a> elements in IE8, the button disappears. If you click again where it was it reappears. But no amount of clicking will actually lead you to the href location. Can anybody explain to me why that might be? I've exhausted all of my thoughts and it still doesn't work. Many thanks for all your thoughts!

The html...

    <div style="padding:0px 0px 30px 0px; clear: both;">
	 <div style="width: 50%; display: block; float: left;">
	  <a href="../index/features" class="big_button">Learn More</a>
	 </div>
	 <div style="width: 50%; display: block; float: left;">
	  <a href="../index/signup" class="big_button">Get Started</a>
	 </div>
    </div>

...and the stylesheet...

     .big_button {
	-moz-box-shadow: inset 0px 1px 0px 0px #bbdaf7;
	-webkit-box-shadow: inset 0px 1px 0px 0px #bbdaf7;
	box-shadow: inset 0px 1px 0px 0px #bbdaf7;
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0.05, #79bbff
		), color-stop(1, #378de5) );
	background: -moz-linear-gradient(center top, #79bbff 5%, #378de5 100%);
	filter: progid : DXImageTransform.Microsoft.gradient (           
		   startColorstr = '#79bbff', endColorstr = '#378de5' );
	background-color: #79bbff;
	-moz-border-radius: 6px;
	-webkit-border-radius: 6px;
	border-radius: 6px;
	border: 1px solid #84bbf3;
	display: inline-block;
	color: #ffffff;
	font-family: Arial;
	font-size: 18px;
	font-weight: bold;
	padding: 15px 45px;
	text-decoration: none;
    margin-left: 130px;
    }

    .big_button:hover {
     background: -webkit-gradient(linear, left top, left bottom, color-stop(0.05, #378de5), color-stop(1, #79bbff) );
     background: -moz-linear-gradient(center top, #378de5 5%, #79bbff 100%);
     filter: progid : DXImageTransform.Microsoft.gradient (startColorstr = '#378de5', endColorstr = '#79bbff' );
     background-color: #378de5;
    }

    .big_button:active {
     position: relative;
     top: 1px;
    }