IE和FF上的Span标签

Question

我有以下代码：

         <div class="container-fluid">
           <div class="row">
              <div class="col-lg-8 col-lg-offset-2">
                   <ul id="controlsCar" class="entries nav nav-pills nav-justified">
                        <li data-target="#custom_carousel" data-slide-to="0">
                             <a href="#">
                                 <span>
                                     <img src="img1.png" alt="" class="img-responsive iconMenu"/>
                                 </span> 
                                 <span>
                                   <div class="menuCarusel">Tittle</div>
                                 </span>
                             </a>
                         </li>


                         <li data-target="#custom_carousel" data-slide-to="1">
                             <a href="#">
                                 <span>
                                     <img src="img2.png" alt="" class="img-responsive iconMenu"/>
                                 </span> 
                                 <span>
                                   <div class="menuCarusel">Tittle1</div>
                                 </span>
                             </a>
                         </li>
                         <li data-target="#custom_carousel" data-slide-to="2">
                             <a href="#">
                                 <span>
                                     <img src="img3.png" alt="" class="img-responsive iconMenu"/>
                                 </span> 
                                 <span>
                                   <div class="menuCarusel">Tittle3</div>
                                 </span>
                             </a>
                         </li>
                        </ul>
                     </div>
                  </div>

它在Safari和Chrome上完美调整大小，但我没有看到使用FireFox或IE的图像有任何变化。

是否与SPAN TAG有关？有任何想法吗？ 感谢