Problemas com submenu no IE

Fala galera, como sempre o IE ferrando nossas vidas... ehehe !

Bom, eu tenho um menu, que alguns elementos possui submenu, e todas as verificações e etc são feitas diretamente no CSS, mas parece que o IE não entende isso.

CSS:

li.menu:hover > div { left: 250px !important; }

.chat-bubble {
 background-color: #FFF;
 border:2px solid #dcdcdc;
 font-size:35px;
 line-height:1.3em;
 left: -4000px;
 top: 250px;
 position:absolute;
 text-align:center;
 width: 385px;
 z-index: 20;
}

.chat-bubble ul h2 { font-size: 16px; text-align: left; }
.chat-bubble ul#city h2 { color: #00783c; margin: 0 0 0 30px; }
.chat-bubble ul#regions h2 { color: #960000; border-left: 1px solid #CCC; padding: 0 0 0 20px; }

.chat-bubble ul#city { float: left; border: none; }
.chat-bubble ul#city li { text-align: left; margin: 0 0 0 30px; }
.chat-bubble ul#city li a { color: #000 !important; }
.chat-bubble ul#city img { border: none; }

.chat-bubble ul#regions { float: left; border: none; }
.chat-bubble ul#regions li { text-align: left; border-left: 1px solid #CCC; padding: 0 0 0 20px; }
.chat-bubble ul#regions li a { color: #000 !important; }
.chat-bubble ul#regions img { border: none; }

.chat-bubble-arrow-border {
 border-color: transparent #dcdcdc transparent transparent;
 border-style: solid;
 border-width: 10px;
 height:0;
 width:0;
 position:absolute;
 bottom:174px;
 left:-22px;
}
.chat-bubble-arrow {
 border-color: transparent #FFF transparent transparent;
 border-style: solid;
 border-width: 10px;
 height:0;
 width:0;
 position:absolute;
 bottom:174px;
 left:-19px;
}

HTML:

<li class="<?php if( $m === "descobrindo" ) { echo "active"; } ?> menu">
 <a href="<?php echo URLRAIZ; ?>descobrindo_italia.php">Descobrindo</a>

 <div class="chat-bubble">
 <ul id="city" class="submenu">
 <h2>CIDADES</h2>
 <?php
 $modelCity = new City();

 $city = $modelCity->findByCategoryId( 1 );

 foreach( $city as $key => $val )
 {
 ?>
 <li>
 <img src="<?php echo URLIMG . "verde.jpg" ?>" />
 <a href="<?php echo URLRAIZ; ?>descobrindo.php?o=<?php echo $val[ "permalink" ] ?>"><?php echo $val[ "name" ] ?></a>
 </li>
 <?php
 }
 ?>
 </ul>

 <ul id="regions" class="submenu">
 <h2>REGIÕES</h2>
 <?php
 $modelCity = new City();

 $city = $modelCity->findByCategoryId( 2 );

 foreach( $city as $key => $val )
 {
 ?>
 <li>
 <img src="<?php echo URLIMG . "vermelho.jpg" ?>" />
 <a href="<?php echo URLRAIZ; ?>descobrindo.php?o=<?php echo $val[ "permalink" ] ?>"><?php echo $val[ "name" ] ?></a>
 </li>
 <?php
 }
 ?>
 </ul>
 <div class="chat-bubble-arrow-border"></div>
 <div class="chat-bubble-arrow"></div>
 </div>
 </li>

Obrigado !