Cara, pois vai lá no código referente ao body e coloca isso:
background-image: url('../images/Middle_texture.jpg');
background-repeat: repeat-x;
background-position: top left;
Deve ficar assim:
body{
margin: 0 auto;
padding: 0;
color: #0C2337;
background-color: #FFFFFF;
background-attachment: fixed;
background-image: url('../images/Middle_texture.jpg');
background-repeat: repeat-x;
background-position: top left;
}
PS: Faz o backup antes. Agora deve dar certo.
