I have iphoneinvasion.com site based on WP platform up and running, only problem I have sidebar in IE6 showing on a bottom...Please help
here is CSS code:

style.css




/* Links */

a:link { text-decoration: none; color: #549AD8; }

a:visited { text-decoration: none; color: #549AD8; }

a:hover, a:active { color: #49AF61; }

/* Headings */

h1, h2, h3, h4, h5, h6 { font-weight: normal; margin: 20px 0 10px; }

h1 { font-size: 32px; margin-bottom: 0px; margin-top: 10px;}

h2 { font-size: 28px; }

h3 { font-size: 24px; }

h4, h5, h6 { font-size: 20px; }

/* Other Html Elements */
.titles { font-weight: normal; border-bottom-width: 0; font-size: 24px; text-decoration: none; underline: none;}
.titles a:link, .titles a:visited, .titles a:active {
text-decoration: none;
underline: none;
font-size: 24px;
font-weight: normal;
border-bottom-width: 0;
}

pre, blockquote
{
overflow: auto;
padding: 0 10px;
margin: 20px 30px;
line-height: 1.8em;
background-color: #f5f5f5;
border: 1px solid #e0e0e0;
}

pre:hover, blockquote:hover
{
background-color: #f0f0f0;
border: 1px solid #d0d0d0;
}

pre { padding-top: 10px; padding-bottom: 10px; }

code { color: #779900; font-family: Consolas, Verdana, "Courier New", Sans-Serif; }

ul, ol { line-height: 2.0em; }

ul { list-style-image: url(images/bullet.gif); }

abbr, acronym { font-style: normal; border-bottom: 1px dotted #333333; cursor: help; }

del { text-decoration: line-through; color: #999999; }

ins { text-decoration: none; color: #009977; }

/* Structure */

body
{
margin: 0;
padding: 0;
color: #222222;
background-image: url(images/bg.gif);
background-repeat: repeat-x;
background-color: #6E9CC7;
font: normal 76% "Trebuchet MS", "Lucida Grande", Verdana, Georgia, Sans-Serif;
}

#wrapper2 {
width: 768px;
margin-left: auto;
margin-right: auto;
}
#header
{
float: left;
width: 768px;
padding-bottom: 8px;
background: #FFFFFF;
clear: right;
background-image: url(images/header-bg.gif);
background-repeat: no-repeat;
padding-left: 0px;
height: 89px;
margin-top: 13px;
}

#navigation
{
clear: both;
float: left;
width: 100%;
background-image: url(images/header.gif);
height: 220px;
}

#wrapper
{
clear: both;
float: left;
width: 100%;
color: #555555;
background: #FFFFFF;
}

#content-wrapper
{
width: 65%;
float: left;
}

#content
{
float: left;
padding: 0 0px 10px 30px;
}

#sidebar-wrapper
{
width: 35%;
float: right;
vertical-align: top;
}

#sidebar
{
float: right;
padding: 0px 15px 10px 10px;
width: 210px;
margin-right: 15px;
margin-top: 0px;
vertical-align: top;

}

#footer
{
clear: both;
float: left;
width: 748px;
text-align: left;
padding-left: 20px;
background: #FFFFFF;
color: #549AD8;
font-size: 11px;
}

#footer a {
color: #549AD8;
font-size: 11px;
}

#footer a: visited {
color: #549AD8;
}
#footer a:hover {
color: #993019;
border-bottom: 1px dashed #E18A77;
}
#extras
{
float: left;
width: 780px;
color: #444444;
text-align: left;
padding: 0 10px 10px;
margin: 10px 12px 20px;
background-color: #f5f5f5;
border-top: 1px solid #e0e0e0;
border-bottom: 1px solid #e0e0e0;
}

/* Header */

#header h1 { padding-left: 30px; }

/* Navigation */

#navigation ul { list-style-type: none; list-style-image: none; float: right; margin-top: -42px; padding: 0 0px 0 0; }

#navigation li { float: left; }

#navigation li a:link,
#navigation li a:visited
{
float: left;
color: #565656;
display: block;
padding: 5px 10px;
margin-right: 1px;
border: 1px dashed transparent;
height: 24px;
font-size: 14px;
margin-top: 4px;

}

#navigation li a:hover,
#navigation li a:active
{
color: #6D9CC7;
background: #F5F5F5;
border: 1px solid #FFFFFF;
background-repeat: repeat-x;
font-size: 14px;
margin-top: 4px;
}

#navigation li.active a
{
color: #555555;
background-color: #ffffff;
}

/* Wrapper */

#wrapper a:link { font-weight: bold; }

#wrapper a:visited { font-weight: bold; }

#wrapper a:hover, #wrapper a:active { }

/* Content */

#content .post-title a { border-bottom-width: 0; }

#content .post p.img { float: left; margin: 0 15px 0 0; }

#content .post p.img img { padding: 8px; border: 1px solid #d0d0d0; background-color: #eeeeee; }

#content .post-footer
{
font-size: 90%;
color: #888888;
margin-bottom: 5px;
padding:5px 5px 5px 15px;
background-repeat: none;
background-color: #F7FFF0;
border: 1px solid #E2FFCC;
}

/* Sidebar */

.sideblock
{
padding: 5px 10px;
margin-bottom: 20px;
background-color: #F6FAFF;
border: 1px solid #DFEAF7;
}

.sideblock ul { }

.sideblock h3 { margin-top: 5px; font-size: 14px; color: #5CC238; font-weight: bold; }

#sidebar dt { margin: 0; padding-top: 5px; font-weight: bold; color: #666666; }

#sidebar dd { margin: 0 0 5px; padding-bottom: 5px; line-height: 1.8em; }

#sidebar dd a:link { border-bottom-width: 0; font-weight: normal; border-bottom: none; text-decoration: none;}

#sidebar dd a:visited { border-bottom-width: 0; font-weight: normal; border-bottom: none; text-decoration: none; }

#sidebar dd a:hover, #sidebar dd a:active { border-bottom: none; text-decoration: none;}

/* Extras */

#extras h6 { font-size: 14px; text-transform: uppercase; color: #555555; }

#friends
{
float: left;
width: 150px;
margin-left: 20px;
margin-right: 10px;
}

#links
{
float: left;
width: 275px;
margin-right: 50px;
}

#about
{
float: left;
width: 250px;
margin-right: 20px;
}

#friends ul { padding-left: 20px; }

#links dl, #links dt, #links dd { margin: 0; padding: 0; }

#links dt { font-weight: bold; padding-top: 5px; }

#links dd { margin-bottom: 5px; padding-bottom: 5px; border-bottom: 1px dotted #999999; }

/* Comments Styling */
#commentlist li {
margin-bottom: 1.5em;
padding-bottom: 1em;
border-bottom: 1px solid #700000;
}

#commentform {
margin: 1em 0;
background: #FFFFFF;
width: 280px;
}

#commentform textarea {
background: #f8f7f6;
border: 1px solid #d6d3d3;
width: 280px;
}
#commentform textarea:hover {
background: #FFFFFF;
border: 1px solid #d6d3d3;
}
#commentform textarea:focus {
background: #ffffff;
border: 1px solid #939793;
}

#commentform #email, #commentform #author, #commentform #url {
font-size: 1.1em;
background: #f8f7f6;
border: 1px solid #d6d3d3;
width: 280px;
}
#commentform #email:hover, #commentform #author:hover, #commentform #url:hover {
font-size: 1.1em;
background: #ffffff;
border: 1px solid #d6d3d3;
width: 280px;
}
#commentform #email:focus, #commentform #author:focus, #commentform #url:focus {
font-size: 1.1em;
background: #ffffff;
border: 1px solid #939793;
width: 280px;
}
#commentform input{
margin-bottom: 3px;
}

.date {
background: url(images/date.gif) no-repeat;
height: 54px;
margin-bottom: 0px;
width: 54px;
text-align: center;
float: left;
margin-top: 15px;
}
.date .month {
display: block;
color: #E1F6BC;
padding: 2px 0px;
text-align: center;
text-transform: uppercase;
font-size: 10px;
margin-top: 2px;
font-weight: bold;
margin-bottom: 3px;
}
.date .day {
display: block;
color: #FFFFFF;
font: 2.3em Georgia;
padding-top: 0px;
text-align: center;
margin-top: -8px;
}

#left {
width: 60px;
float: left;
}

.slogan {
font-size: 13px;
color: #6F6F6F;
text-transform: lowercase;
margin-left: 30px;
margin-bottom: 2px;

}


here is another css in theme

#navigation { float: left; }

#navigation ul { float: right; }

#navigation li.active a:link,
#navigation li.active a:visited
{
color: #555555;
background-color: #ffffff;
}

#content-wrapper { width: 58%; }

#content pre { width: 360px; overflow: hidden; }

#wrapper h3.post-title a:link,
#wrapper h3.post-title a:visited
{
border-bottom-width: 0;
}

#extras { padding-right: 0; margin-right: 0; margin-left: 8px; padding-left: 0; }

#extras #friends ul { padding-left: 0; margin-left: 20px; }

#extras #links { width: 250px; }

here is index.php


<?php get_header(); ?>
<div id="wrapper">

<div id="content-wrapper">

<div id="content">



<?php if (have_posts()) : ?>

<?php while (have_posts()) : the_post(); ?>


<div class="post-wrapper">
<div class="date">
<span class="month"><?php the_time('M') ?></span>
<span class="day"><?php the_time('j') ?></span>
</div>


<div style="float: right; width: 410px; clear: right; margin-top: 15px; margin-bottom: 15px; padding-top: 10px; margin-left: 5px;"><span class="titles"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title(); ?>">
<?php the_title(); ?>
</a></span></div>

<div class="post">

<?php the_content('Read the rest of this entry &raquo;'); ?>

</div>

<div class="post-footer">Posted in <?php the_category(', ') ?> <strong>|</strong> <?php edit_post_link('Edit','','<strong>|</strong>'); ?> <?php comments_popup_link('No Comments &raquo;', '1 Comment &raquo;', '% Comments &raquo;'); ?></div>

</div>

<?php comments_template(); ?>

<?php endwhile; ?>

<p class="pagination"><?php next_posts_link('&laquo; Previous Entries') ?> <?php previous_posts_link('Next Entries &raquo;') ?></p>

<?php else : ?>

<h2 align="center">Not Found</h2>

<p align="center">Sorry, but you are looking for something that isn't here.</p>

<?php endif; ?>



</div>

</div>
<?php get_sidebar(); ?>
<?php get_footer(); ?>

</body>
</html>

Sounds like float drop to me. IE's busted box model can cause this. Make sure the widths of your 'boxes', including margins and padding are not wider than the container they sit inside.