Internet Explorer 7 li link hover bug

Internet Explorer 7 only; FireFox, IE 8, Chrome works fine.

My left menu

http://box1.thegiant.ca/~cuisirama/index.php

If you hover any link the brackground becomes transparent how can i fix this?

Here is my CSS:

div.moduletable_mg { 
 border-top: 1px solid #9C907D;
 padding: 0px;
 margin: 0px;
}
div.moduletable_mg ul {
 padding: 15px;
 margin:  0px 0px 0px 0px;
}
div.moduletable_mg ul li {
 background: url(../images/menu-arrow.png) no-repeat left center;
 min-height: 15px;
 padding: 0px 10px;
 margin:  0px;
}
div.moduletable_mg a {
 /*display:inline-block;*/
 /*b开发者_如何转开发ackground: transparent !important;*/
 font-size: 14px;
 padding: 0px;
 margin:  0px;
 color: #483A22;
}
div.moduletable_mg a:link, div.moduletable_mg a:visited {
 text-decoration: none; 
}
div.moduletable_mg a:hover, div.moduletable_mg a:active {
 text-decoration: underline;
}

It seems to be a 'hasLayout' issue. The problem actually is with your #gdw2-mcleft container. If I put a style on it to give that container 'layout', then it seems to behave as you desire (I used zoom: 1 as my test, but you might desire to add some other style property that gives it layout).