css 在IE下正常，在火狐下产生错位

《页面代码》

<div id="sjdq">
     <div class="sjdq_tlj">
         <a href="#" target="_blank"><img src="images/qsj_lj.jpg" /></a>
        </div>
        <div class="sjdq_bg">
            <div class="sjdq_bg1l">
                <dl>
                <dt class="sjdq_bg_1">公告日期</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                <dt>2010-07-06</dt>
                </dl>
            </div>
        </div>
  </div>

《css》

#tzl #sjdq{ width:980px; height:auto; background-color:#f7fcff; margin:10px 0px 0px 0px; float:left; border:1px solid #d7d7d7; overflow:hidden;}
#tzl #sjdq .sjdq_tlj{ width:980px; height:35px;  background-color:#ca5657; margin:1px 1px 0px 1px; float:left; overflow:hidden; display:inline;}
#tzl #sjdq .sjdq_bg{ width:980px; height:575px; float:left;}
#tzl #sjdq .sjdq_bg .sjdq_bg1l{width:124px; height:auto;float:left;}
#tzl #sjdq .sjdq_bg .sjdq_bg1l dd{width:123px; height:25px;}
#tzl #sjdq .sjdq_bg .sjdq_bg1l dt{width:123px; height:25px; font-size:12px;margin:0px 0px 0px 0px; border-top:1px solid #d0e7f8; border-right:1px solid #d0e7f8; text-align:center; padding:15px 0px 0px 0px; background-color:#333;}

没啥错位呀，如果指中间的空行，你可以css中加一行

#tzl #sjdq .sjdq_bg dl { margin-top:0px; }