CSS - Screen Resolution Problem (hi-res Ok, Lower Res All Messed Up!)

Hi everyone,

In high resolution settings (like 1600x900) this layout looks great. But, on 1280 x 720 the layout gets all screwed up.

Can someone look at the CSS below and let me know where I'm screwing up? Thanks!

The site is romanceplaybook dot com and here is the CSS:

body {
background: #ffffff url(images/bkgd.jpg) top repeat-y;
color: #333333;
font-size: 11px;
font-family: Verdana, Helvetica, Sans-Serif;
margin: 0px auto 0px;
padding: 0px;
}

#wrap {
background: #ffffff url(images/bg.jpg) top center repeat-y;
color: #333333;
font-size: 11px;
font-family: Verdana, Helvetica, Sans-Serif;
margin: 0px 300px 0px;
padding: 0px;
}

/************************************************
* Hyperlinks *
************************************************/

a, a:visited{
color: #507AA5;
text-decoration: none;
}

a:hover{
text-decoration: underline;
}

/************************************************
* Header *
************************************************/

#header {
background: #FFFFFF;
width: 1000px;
margin: 0px auto 0px;
padding: 0px 0px 0px 0px;
text-align: center;
text-transform: uppercase;
}

#header a {
font-family: Times New Roman, Helvetica, Sans-Serif;
font-size: 48px;
color: #333333;
text-decoration: none;
padding: 0px 10px 0px 10px;
margin: 0px;
text-transform: uppercase;
}

#header a:hover{
color: #333333;
}

/************************************************
* Navbar *
************************************************/

/************************************************
* Left Sidebar *
************************************************/

#l_sidebar {
float: left;
width: 160px;
margin: 0px 20px 0px 0px;
padding: 20px 0px 20px 0px;
}

#l_sidebar ul {
list-style: none;
margin: 0px;
padding: 0px 0px 20px 0px;
}

#l_sidebar li {
list-style: none;
margin: 0px;
padding: 0px;
}

#l_sidebar ul li {
margin: 0px;
padding: 5px 0px 0px 0px;
}

#l_sidebar ul li a {
color: #507AA5;
text-decoration: none;
}

#l_sidebar ul li a:hover {
color: #507AA5;
text-decoration: underline;
}

/************************************************
* Right Sidebar *
************************************************/

#r_sidebar {
float: right;
width: 160px;
margin: 0px 0px 0px 0px;
padding: 20px 0px 0px 0px;
}

#r_sidebar p{
padding: 2px 0px 16px 0px;
margin: 0px;
line-height: 20px;
}

#r_sidebar ul {
list-style: none;
margin: 0px;
padding: 0px 0px 20px 0px;
}

#r_sidebar ul li {
margin: 0px;
padding: 5px 0px 0px 0px;
}

#r_sidebar ul li a {
color: #507AA5;
text-decoration: none;
}

#r_sidebar ul li a:hover {
color: #507AA5;
text-decoration: underline;
}

/************************************************
* Content *
************************************************/

#content {
width: 950px;
margin: 0px auto 0px;
padding: 0px;
}

#content p{
padding: 0px 0px 15px 0px;
margin: 0px;
line-height: 20px;
}

#content p img{
float: left;
border: none;
margin-right: 15px;
margin-bottom: 10px;
}

#content h1 {
color: #333333;
font-size: 22px;
font-family: Times New Roman, Verdana, Arial, Sans-Serif;
font-weight: normal;
padding: 0px 0px 0px 0px;
margin: 0px;
}

#content h1 a {
color: #333333;
text-decoration: none;
}

#content h1 a:hover {
color: #658DB5;
text-decoration: none;
}

#content h2 {
color: #333333;
font-size: 14px;
font-family: Times New Roman, Verdana, Arial, Sans-Serif;
font-weight: bold;
padding: 5px 0px 5px 0px;
margin: 0px;
border-top: 1px dotted #C0C0C0;
border-bottom: 1px dotted #C0C0C0;
}

#content p ol{
margin: 0px;
padding: 0px 0px 0px 20px;
}

#content p ul{
margin: 0px;
padding: 0px 0px 0px 20px;
}

blockquote{
margin: 0px 0px 0px 25px;
padding: 0px 25px 0px 10px;
font-style: italic;
color: #666666;
border-left: 3px solid #B3C8DB;
}

#content blockquote p{
margin: 0px 0px 20px 0px;
padding: 0px;
}

#contentmiddle {
float: left;
width: 550px;
margin: 0px 0px 0px 0px;
padding: 20px 5px 10px 20px;
text-align: left;
}

#contentmiddle p img{
float: left;
border: none;
margin-right: 15px;
margin-bottom: 10px;
}

.contentdate {
background: #FFFFFF url(images/date.gif);
float: left;
width: 45px;
height: 50px;
margin: 0px;
padding: 0px;
}

.contentdate h3 {
color: #FFFFFF;
font-size: 10px;
font-weight: normal;
padding: 1px 0px 0px 10px;
margin: 0px;
text-transform: uppercase;
}

.contentdate h4 {
font-family: Times New Roman, Helvetica, Sans-Serif;
color: #999999;
font-size: 21px;
font-weight: bold;
padding: 5px 4px 0px 0px;
margin: 0px;
text-align: center;
}

.contenttitle {
float: left;
width: 480px;
margin: 0px;
padding: 0px 0px 0px 10px;
}

#contentmiddle ul {
list-style: none;
margin: 0px;
padding: 0px 0px 20px 0px;
}

#contentmiddle ul li {
margin: 0px;
padding: 5px 0px 0px 0px;
}

#contentmiddle ul li a {
color: #507AA5;
text-decoration: none;
}

#contentmiddle ul li a:hover {
color: #507AA5;
text-decoration: underline;
}

#content img.wp-smiley {
float: none;
border: none;
padding: 0px;
margin: 0px;
}

#content img.wp-wink {
float: none;
border: none;
padding: 0px;
margin: 0px;
}

.postspace {
background: #EFEFEF url(images/spacer.gif);
width: 440px;
height: 32px;
margin: 0px;
padding: 0px;
}

/************************************************
* Footer *
************************************************/

#footer {
background: #FFFFFF;
width: 952px;
margin: 0px auto 0px;
padding: 10px 0px 10px 0px;
text-align: center;
border-top: 1px solid #C0C0C0;
}

/************************************************
* Search Form *
************************************************/

#searchdiv {
margin: 0px;
padding 0px;
}

#searchform {
margin: 0px;
padding: 0px;
overflow: hidden;
}

#s {
width: 190px;
background: #EFEFEF url(images/search.gif);
color: #333333;
font-size: 11px;
font-family: Verdana, Helvetica, Sans-Serif;
padding: 3px;
margin: 8px 0px 0px 0px;
border: 1px solid #C0C0C0;
}

/************************************************
* Comments *
************************************************/

#commentblock {
width: 395px;
background: #EFEFEF;
color: #333333;
float: left;
padding: 10px 20px 0px 20px;
margin: 10px 0px 10px 0px;
border: 1px solid #C0C0C0;
}

ol#commentlist {
padding: 5px 0px 5px 0px;
margin: 0px;
list-style-type: none;
}

.commentdate {
font-size: 12px;
padding-left: 0px;
}

#commentlist li p{
margin-bottom: 8px;
line-height: 20px;
padding: 0px;
}

.commentname {
color: #333333;
margin: 0px;
padding: 5px 5px 5px 0px;
}

.commentinfo{
clear: both;
}

.commenttext {
clear: both;
margin: 5px 0px 20px 0px;
padding: 20px 10px 5px 10px;
width: 365px;
background: #FFFFFF url(images/comment.gif) no-repeat top;
}

.commenttext-admin {
clear: both;
margin: 5px 0px 20px 0px;
padding: 20px 10px 5px 10px;
width: 365px;
background: #FFFFFF url(images/comment.gif) no-repeat top;
}

#commentsformheader{
padding-left: 0px;
}

#commentsform{
text-align: left;
margin: 0px;
padding: 0px;
}

#commentsform form{
text-align: left;
margin: 0px;
}

#commentsform p{
margin: 0px;
}

#commentsform form textarea{
width: 99%;
}

p.comments_link img{
margin: 0px;
padding: 0px;
border-top-style: none;
border-right-style: none;
border-bottom-style: none;
border-left-style: none;
}