Глюк в IE, CSS

.menu a,.menu a:visited {
background: #0000B0 url("button.png") repeat-y center;
...
display: block;
}
.menu a:hover {
background: #1616C6 url("button1.png") repeat-y center;
border: 1px solid #4040D0;
color: white;
}

<img src="button.png" width=1 height=1>
<img src="button1.png" width=1 height=1>

.menu a,.menu a:visited {
background: #0000B0 url("button.png") repeat-y left;
border: 1px solid #0000D0;
color: #F0F0F0;
font-weight: bold;
text-align: center;
text-decoration: none;
padding: 1px 0;
margin: 2px;
width: 130px;
display: block;
overflow: hidden;
}
.menu a:hover {
background-color: #1616C6;
background-position: -130px 0;
border: 1px solid #4040D0;
color: white;
}

.menu a,.menu a:visited {
background: #0000B0 url("button.png") repeat-y;
background-position: 0;
...

.menu a,.menu a:visited {
background-color: #0000B0;
background-image: url("button.png");
background-position: 0;