Different block in IE6

Hello
I have problem with core blocks.
Check my screen http://i41.tinypic.com/161bzeo.gif
In left, view in FF, in right, IE6.

This is my CSS:

ul.menu li a, li.expanded a, li.collapsed a, li.leaf a, .block .item-list ul li a
{
background:url(images/arrow2.png) no-repeat right 3px;
border-bottom: 1px solid #d9dddc;
border-bottom-style:dotted;
color:#B90101;
display:block;
font-size:1.1em;
font-weight:bold;
line-height: 19px
margin:0 2px;
padding:0 0 3px;
text-transform:none;
}

Where is problem?