ul li元素在IE中比firefox有更多的空间

<ul class="sa-progress">
<li class="sa-progress-current"><span id="intro_idx" >Select VPN Type</span></li>
<li class="sa-progress-default"><span id="local_idx" >Local</span></li>
<li class="sa-progress-default"><span id="remote_idx" >Remote</span></li>
<li class="sa-progress-default"><span id="vpn_idx" >VPN</span></li>
<li class="sa-progress-default"><span id="remote_dyn_idx" >Remote Users</span></li>
<li class="sa-progress-default"><span id="traffic_idx" >Traffic Profile</span></li>
<li class="sa-progress-default"><span id="review_idx" >Review &amp; Commit</span></li>
</ul>

ul.sa-progress {
    color: #333333;
    line-height: normal;
    padding: 7px 0 10px 10px;
}
ul.sa-progress {
    font-size: 12px;
}