Por que no se ve bien en explorer?

[serks]

Mi style.css (lo pongo en dos mensajes porque no cabe en uno):

Código:

/* Getting the new tags to behave */
article, aside, audio, canvas, command, datalist, details, embed, figcaption, figure, footer, header, hgroup, keygen, meter, nav, output, progress, section, source, video {display:block}
mark, rp, rt, ruby, summary, time {display:inline}
/* Global properties */
body {background:#fff;font-family:Arial, Helvetica, sans-serif;font-size:100%;line-height:1em;color:#464646}
html {min-width:980px}
html, body {height:100%}
/* Global Structure = */
.container {margin:0 auto;width:990px;font-size:.75em}
/* Header */
header .container {height:131px;overflow:hidden;position:relative}
/* Sidebar */
aside {background:url(../images/aside-tail.gif) repeat-x left top #131313;min-width:980px}
/* Footer */
footer .container {text-align:center;line-height:1.667em;padding:26px 0}
/* Left & Right alignment */
.fleft {float:left}
.fright {float:right}
.clear {clear:both}
.col-1, .col-2, .col-3, .col-4, .col-5 {float:left}
.alignright {text-align:right}
.aligncenter {text-align:center}
.wrapper {width:100%;overflow:hidden}
.wrap {width:100%}
/* tailings */
.tail-top, .tail-top1, .tail-top2, .tail-top3 {background-repeat:repeat-x;background-color:#f2f2f2;background-position:left top;min-width:980px}
.tail-top {background-image:url(../images/tail-top.gif)}
.tail-top1 {background-image:url(../images/tail-top1.gif)}
.tail-top2 {background-image:url(../images/tail-top2.gif)}
.tail-top3 {background-image:url(../images/tail-top3.gif)}
/* form defaults */
input, select, textarea {font-family:Arial, Helvetica, sans-serif;font-size:1em;vertical-align:middle;font-weight:normal;color:#393939;margin:0;padding:0}
fieldset {border:0}
/* lists */
.info-list {padding-bottom:5px}
.info-list li {text-align:right;width:100%;overflow:hidden;vertical-align:top;border-bottom:1px solid #dfdfdf;padding:0 0 6px 5px;margin:0 0 6px -5px}
.info-list li span {float:left}
.info-list1 {padding-bottom:5px}
.info-list1 li {width:100%;overflow:hidden;vertical-align:top;border-top:1px solid #dfdfdf;padding:6px 0 0 5px;margin:6px 0 0 -5px}
.info-list1 li:first-child {border:none;padding-top:0;margin-top:0}
.info-list1.alt li {text-align:center}
.solutions li {width:100%;overflow:hidden;vertical-align:top;margin:18px 0 0 -8px;background:url(../images/divider1.gif) repeat-x left top;padding-top:20px}
.solutions li:first-child {background:none;padding-top:0;margin-top:0}
.solutions li img {float:left;margin-right:9px} 
.solutions li p {margin-bottom:10px}
.list li {line-height:1.667em}
.list li:first-child {font-weight:bold}
.list li,
.list li a {color:#e5e5e5}
.list li a {text-decoration:none}
.list li a:hover {color:#6fa803}
.list1 {padding-bottom:11px} 
.list1 li {padding:0 0 15px 10px;height:1%;background:url(../images/marker.gif) no-repeat left 4px}
.banners {padding:12px 0 0 0}
.banners li {float:left;font-size:26px;line-height:2.4em;letter-spacing:-1px;margin-left:6px}
.banners li:first-child {margin-left:0}
.banners li a {width:242px;display:block;height:65px;background:url(../images/banner-bg.gif) no-repeat left top;text-align:center;color:#fff;text-decoration:none}
/* other */
.img-indent {margin:0 20px 0 0;float:left}
.img-box {width:100%;overflow:hidden;padding-bottom:12px;line-height:1.667em}
.img-box img {float:left;margin:0 20px 0 -1px}
.extra-wrap {overflow:hidden}
p {margin-bottom:10px;line-height:1.667em}
.p0 {margin:0}
.p1 {margin-bottom:18px}
.price {text-align:center;display:block;font-size:30px;line-height:1.2em;letter-spacing:-1px;padding-bottom:10px}
#slogan {background:url(../images/slogan-bg.jpg) no-repeat left top;width:980px;height:220px;margin:12px 0 0 0;position:relative;left:3px;color:#fff;text-shadow:1px 1px #3e7901;position:relative}
#slogan h2 {font-size:26px;text-transform:uppercase;color:#fff}
#slogan h2 span {color:#262626}
#slogan .inside {position:absolute;left:360px;top:50px;width:576px}
address {font-style:normal;line-height:1.667em;display:block;padding-bottom:20px}
address b {float:left;width:73px}
/* txt, links, lines, titles */
a {color:#428301;outline:none}
a:hover {text-decoration:none}
h1 {padding:17px 0 0 44px;font-size:36px;line-height:1.2em}
h1 a {text-decoration:none}
h2 {color:#464646;font-size:30px;line-height:1.2em;margin-bottom:15px;letter-spacing:-1px}
h2.extra {padding:30px 0 0 43px}
h3 {font-size:26px;line-height:1.2em;color:#fff;margin-bottom:30px}
h4 {font-size:20px;line-height:1.2em;color:#fff;margin-bottom:27px;letter-spacing:-1px}
h4.extra {margin-bottom:12px}
h5 {font-size:1em;line-height:1.667em;margin-bottom:10px}
.link1 {display:inline-block;color:#fff;font-size:15px;line-height:1.2em;text-decoration:none;background:url(../images/link1-right.png) no-repeat right top;padding-right:7px;letter-spacing:-1px;text-transform:uppercase}
.link1:hover {color:#82b704}
.link1 span {display:block;background:url(../images/link1-left.png) no-repeat left top;padding-left:7px}
.link1 span span {background:url(../images/link1-bgd.png) left top repeat-x;padding:12px 14px}
.link2 {display:inline-block;color:#fff;font-size:15px;line-height:1.2em;text-decoration:none;background:url(../images/link2-bgd.gif) left top repeat-x;letter-spacing:-1px;text-transform:uppercase}
.link2:hover {color:#000}
.link2 span {display:block;background:url(../images/link2-left.gif) no-repeat left top}
.link2 span span {background:url(../images/link2-right.gif) no-repeat right top;padding:10px 22px}
.link3 {display:inline-block;color:#fff;font-size:15px;line-height:1.2em;text-decoration:none;background:url(../images/link3-bgd.gif) left top repeat-x;letter-spacing:-1px;text-transform:uppercase}
.link3:hover {color:#82b704}
.link3 span {display:block;background:url(../images/link3-left.gif) no-repeat left top}
.link3 span span {background:url(../images/link3-right.gif) no-repeat right top;padding:8px 19px}
.link4 {display:inline-block;color:#fff;font-size:15px;line-height:1.2em;text-decoration:none;background:url(../images/link4-bgd.gif) left top repeat-x;letter-spacing:-1px;text-transform:uppercase}
.link4:hover {color:#82b704}
.link4 span {display:block;background:url(../images/link4-left.gif) no-repeat left top}
.link4 span span {background:url(../images/link4-right.gif) no-repeat right top;padding:10px 22px}
.line-ver1 {background-image:url(../images/line-ver1.gif);background-repeat:repeat-y;background-position:336px 0;width:100%}
.line-ver2 {background-image:url(../images/line-ver1.gif);background-repeat:repeat-y;background-position:457px 0;width:100%}
.line-ver3 {background-image:url(../images/line-ver1.gif);background-repeat:repeat-y;background-position:617px 0;width:100%}
.line-ver4 {background-image:url(../images/line-ver1.gif);background-repeat:repeat-y;background-position:777px 0;width:100%}