Şunu bi' deneyebilir misin:

body, h1, h2, h3, h4, h5, h6, p, form {
    margin: 0;
    padding: 0;
}
body {
    margin: 0;
    font-family: Calibri, Verdana, Georgia, Sans-serif;
    font-size: 12px;
    vertical-align: top;
    background-color: #fe6602;
         background-image: url(images/arkaplan.jpg);
         background-repeat: repeat-x;
}
h1 {
    font-family: Calibri, Verdana;
    font-size: 30px;
    padding: 0 0 10px 0;
}
a:link, a:visited {
    text-decoration: none;
    color: #336699;
}
a:hover {
    text-decoration: none;
}
p {
    padding: 10px 0 0 0;
}
#outer {
        width:970px;
        background:#fff;
        margin: 5px auto 1px auto;
        padding: 0 0 1px 0;
}
#wrapper{
    margin: 0 auto 0px auto;
    width: 966px;
    text-align: left;
}
#header{
    float: left;
    width: 958px;
        height: 89px;
        background: #0099cb; 
        margin:1px auto;
        padding: 2px 0 2px 8px;
        text-decoration:none;
        background:url(images/header.jpg) repeat-y;
}
#header_l {
        float:left;
        width:400px;height:90px;
        margin-bottom:10px; padding:0;
}
#header_r {
        float:right;height:91px;width:506px;
        margin:0; padding:0;
        background-image:url(images/ads-holder.jpg);
}
#header_r_ads {
        margin:2px 0 0 39px; padding:0;
        width:468px;
        height:62px;          
}
#nav {
        clear:both;
        margin:1px auto 1px auto;
        width: 966px;
        height:31px;
        background: url(images/topmenu.jpg) repeat-x;
        overflow:hidden; 
}
#nav_l {
        float:left;
        width:865px;  
        margin:0px; padding:0px; 
        overflow:hidden;
        height:31px; 
}
.menu {
        float:left;
        margin:5px 1px;
        padding:3px;
        width:500px;
}
.menu li {
    display: inline;
    list-style: none;
    margin:0;
    padding:0;
}
.menu ul, .menu ol {
        display: inline;
    list-style: none;
    margin:0;
    padding:0 10px 0 0;
}
.menu a, .menu a:visited {
    color: #FFFFFF;
    font-weight: bold;
    margin:0;
    padding: 3px 10px 3px 10px;
    text-decoration: none;
}
.menu a:hover {
    background: #1ba7d4;
    text-decoration: none;
        border:1px solid #fff;
}
#search { 
        height:14px;
        float:right;
        margin:4px 4px 0 0;
}
#search #s { 
        font-size:8pt;
        padding-left:3px;
        padding-bottom:1px; 
        width:180px;
}
input#s { 
        color:#000;
        border:3px solid #7fcbe3;
        background:#fcfcfc;
}
#container{
    float: left;
    width: 550px;
        padding: 6px 10px 10px 10px;
        text-align:justify;
        background: #fff;
        margin:0 auto 1px auto;
}
.post{
    padding: 2px 6px 10px 6px;
}
.post h2{
    font-family: Calibri, Verdana, Sans-serif;
    font-size: 16px;
         margin:0 5px;
         text-align:left;
}
.entry{
    font-family: Calibri, Verdana, Georgia, Sans-serif;
    font-size: 12px;
        color:#02176b;
    line-height: 1.5em;
    margin: 3px 0 5px 0;
}
p.postmetadata{
    margin: 10px 0 0 0;
        padding:6px;
        background: #fff;
}
.navigation{
    padding: 10px 0 0 0;
    font-size: 14px;
    font-weight: bold;
    line-height: 18px;
}
.navleft{
        margin:0;padding:0;
        float:left; 
}
.navright{
        margin:0;padding:0;
        float:right; 
}
blockquote {
        margin:5px 10px;
        padding:4px 7px 10px 7px;
        font-size:10px;
        color:#336699;  
        border:1px dashed #40a9c9;
        background: #d8eaee url(images/quote.gif) no-repeat 10px 4px;        
}
blockquote blockquote {
        margin:5px 10px;
        padding:4px 7px 10px 7px;
        font-size:10px;
        background:#51d600; 
        color:#336699;  
        border:1px dashed #40a9c9;
        background: #d8eaee url(images/quote.gif) no-repeat 10px 4px;      
}
.post_header {
        margin:0; padding:0;
        height:60px;
        background:#fff;
}
.post_headerr {
        margin:0; padding:0;
}
.post_title {
        margin:0 5px; padding:2px 0 0 0;
}
.details {
        margin:0; padding:4px 0;
        border-top:1px dashed #bc581c;
}
.files {
        background:url(images/folder.gif) no-repeat;
        margin:0; padding:0 0 0 20px;
}
.comment_list {
        background:url(images/list_comments.gif) no-repeat;
        margin:0; padding:0 0 0 20px;
}
.edit {
        background:url(images/edit.gif) no-repeat;
        margin:0; padding:0 0 0 20px;
}
.the_date {
        display:block;
        text-align: center;
        float:left;height:60px;
        font-family: Arial, Helvetica, sans-serif;
        width:62px;
        margin:0px 5px 0 0;
        background:url(images/calendar.jpg);
}
.date_m {
        display:block;
        font-size: 0.9em;
        margin:0;
        padding-top:5px;
        color:#fff;
        font-weight: bold;
        text-align:center;
}
.date_d {
        display:block;
        font-size:1.2em;
        margin:0;
        color:#336699;
        font-weight: bold;
        padding:0.7em 0 1.1em 0;
        text-align: center;
}
#commentsbox { 
        margin: 0px; padding: 0px; 
        float: left; 
        width: 540px; 
        font-size:11px;
}
#comments h2 { 
        margin:5px 0 0 0; 
        padding:0; 
        color:#ff5c00; 
        font-size:14px; 
        font-weight:normal;
}
h3 #respond  {
        margin:10px 0; 
        padding:0; 
        color:#ff5c00; 
        font-size:14px; 
        font-weight:normal;
}
.boxcomments { 
        margin-bottom:20px;
        width:520px;
}
#commentform { 
        border-top:1px solid #eee;
        margin:0;padding:15px 15px 1px;
}
#commentform label { 
        display:block;
        margin:0;
}
#commentform input { 
        width:170px;
        margin:0 5px 10px 0;
        padding:1px;
}
#commentform textarea { 
        width:400px;margin:0 0 10px;
        padding:0;
        }
#commentform #submit { 
        margin:0 0 20px;
}
#commentform p { 
        margin:5px 0; 
}
ol.commentlist { 
        margin:0 0 1px;
        padding:0;
}
ol.commentlist li { 
        border:1px dashed #31afda;
        display:block;
        list-style:none;margin:7px 0;
        padding:6px 15px 12px 15px; 
        background:url(images/comment_l.jpg) repeat-x;
}
ol.commentlist li.mycomment { 
        border-bottom:20px solid #fff; 
        display:block;
        list-style:none;
        margin:7px 0;padding:5px 15px 1px; 
        background:#f3fdff;
}
ol.commentlist li.commenthead { 
        display:block;
        list-style:none;
        margin:0;padding:5px 15px;
}
ol.tblist { 
        list-style:none;
        margin:0 0 1px;
        padding:0;
}
ol.tblist li { 
        display:block;
        list-style:none;
        padding:10px 5px 10px 5px;
        margin:0 0 5px; 
        border:1px dashed #ccc;
}
input#url,input#author,input#email,textarea { 
        color:#666;
        width:40%;
        border:1px solid #cbcbcb;
        margin-bottom:0.6em;
        background:#fcfcfc;
        margin-top:2px;padding:3px;
}
.sidebar{
    float: left;
    width: 386px;
        background:#fff;
}
.sidebar ul{
    list-style: none;
    margin: 0;
    padding: 0 10px 0 10px;
}
.sidebar ul li{
    padding: 10px 0;
}
.sidebar ul li h2{
    font-family: Georgia, Sans-serif;
    font-size: 14px;
}
.sidebar ul ul li{
    padding: 0;
    line-height: 24px;
}
#sidebar_top {
        margin:6px 0 0 0;padding:8px;
        background:url(images/sidebar_top.jpg) repeat-x;
        width: 369px;
        line-height:16px;
        text-align:justify;
        border:1px solid #91d3e9;
        font-size:11px;
        font-family:calibri;
}
#sidebar_top h4 {
        color:#0e5268;
        margin-bottom:3px;
        font-size:14px;
}
.lsidebar {
        margin:0;padding:0;
        float:left;
        width:184px;
}
.lsidebar ul{
    list-style: none;
    margin: 0;
    padding: 0 1px 0 0;
}
.lsidebar ul li{
    padding: 10px 0 4px 0;
    font-family: Arial, Georgia, Sans-serif;
    font-size: 11px;
        color:#7a888c;
    margin:0;
}
.lsidebar ul li a:link, .lsidebar ul li a:visited {
        color:#0199cb;
        font-weight:700;
}
.lsidebar ul li h2{
    font-family: Verdana,Arial, Georgia, Sans-serif;
    font-size: 11px;
        background:url(images/cat.jpg) no-repeat top left;
        margin:0; padding:7px 0 0 8px;
        height:30px;width:182px;
        color:#fff;
}
.lsidebar ul ul li{
    padding: 0 0 0 20px;
    line-height: 18px;
    font-family: Arial, Georgia, Sans-serif;
        background:url(images/arrow_blue.jpg) no-repeat 0px 0px; 
}
.lsidebar ul ul ul li{
    padding: 0 0 0 14px;
    line-height: 18px;
    font-family: Arial, Georgia, Sans-serif;
        font-size:11px;
        background:url(images/sub-cat.jpg) no-repeat 3px 3px;
}
.lsidebar ul ul ul li a:link, .lsidebar ul ul ul li a:visited {
        color:#39b0d8;
        font-weight:700;
}
.rsidebar {
        margin:0;padding:0;
        float:right;
        width:181px;
}
.rsidebar ul{
    list-style: none;
    margin: 0;
    padding: 0 1px 0 0;
}
.rsidebar ul li{
    padding: 10px 0 4px 0;
    font-family: Arial, Georgia, Sans-serif;
    font-size: 11px;
        color:#7a888c;
    margin:0;
}
.rsidebar ul li a:link, .rsidebar ul li a:visited {
        color:#0199cb;
        font-weight:700;
}
.rsidebar ul li h2{
    font-family: Verdana, Arial, Georgia, Sans-serif;
    font-size: 11px;
        background:url(images/cat.jpg) no-repeat top left;
        margin:0; padding:7px 0 0 8px;
        height:30px;width:182px;
        color:#fff;
}
.rsidebar ul ul li{
    padding: 0 0 0 22px;
    line-height: 18px;
    font-family: Arial, Georgia, Sans-serif;
        background:url(images/arrow_blue.jpg) no-repeat 2px 0px; 
}
.rsidebar ul ul ul li{
    padding: 0 0 0 14px;
    line-height: 18px;
    font-family: Arial, Georgia, Sans-serif;
        font-size:11px;
        background:url(images/sub-cat.jpg) no-repeat 3px 3px;
        border-bottom:none;
}
.rsidebar ul ul ul li a:link, .rsidebar ul ul ul li a:visited {
        color:#39b0d8;
        font-weight:700;
}
table#wp-calendar{
    width: 90%;
        margin:0px auto;
}
#footer{
    clear: both;
    width: 966px;
        background:url(images/footer.jpg) repeat-x;
        padding:10px 0;
        margin:0;
}
#footer p {
    line-height: 13px;
        text-align:center;
        font-weight:700;
        color:#fff;
        padding: 2px 0;
        font-size: 10px;
        font-family:Verdana;
}
#footer a {
        color:#afe1f3;
}
#footer a:hover {
        color:#53c7f2;
}
.sidebar'daki margin değerini sildim.