kukan, \"X\" ставить необязательно!

.head{
background-image: url (\'.../images/0head.png\');
background-repeat: repeat;
height:40px;
position:relative;
right:0px;
left:0px;
top:0px;
z-index:100;
margin: 0 auto;
width: 810px;
border-radius: 0 0 10px 10px;