Css+Validator+Results=?

Hi guys, nice to be a part of the forum, yesterday i tried tu put this website online, in firefox works perfectely, but IE got all screewd, i use a validator but many things i didnt understang, i will give the results and the CSS.

Results Validator


6 	body 	Value Error : font-size Too many values or values are not recognized : 52%/1.52em 52%/1.52em
43 		The pseudo-element ::selection can't appear here in the context css21 [selection]
46 		The pseudo-element ::-moz-selection can't appear here in the context css21 [-moz-selection]
56 	form fieldset 	Property -webkit-border-radius doesn't exist : 5px 5px
56 	form fieldset 	Property -moz-border-radius doesn't exist : 5px 5px
56 	form fieldset 	Property border-radius doesn't exist in CSS level 2.1 but exists in : 5px 5px
59 	form input[type="text"], form input[type="email"], form input[type="url"], form input[type="password"] 	Property -moz-border-radius doesn't exist : 4px 4px
60 	form input[type="text"], form input[type="email"], form input[type="url"], form input[type="password"] 	Property -webkit-border-radius doesn't exist : 4px 4px
61 	form input[type="text"], form input[type="email"], form input[type="url"], form input[type="password"] 	Property border-radius doesn't exist in CSS level 2.1 but exists in : 4px 4px
69 	form textarea 	Property -moz-border-radius doesn't exist : 4px 4px
70 	form textarea 	Property -webkit-border-radius doesn't exist : 4px 4px
71 	form textarea 	Property border-radius doesn't exist in CSS level 2.1 but exists in : 4px 4px 

CSS:


@charset "utf-8";
/* 52framework General StyleSheet - contains styles for all the HTML elements this framework supports */

body {
	font-family: Arial, Helvetica, sans-serif;
	font-size:52%/1.52em;
}

a {	color:#cc9;	text-decoration: none; }
a:hover, a:focus { text-decoration:none; color: #fff; }
a:active, a:visited { }

blockquote {
		font-family: Georgia,"Times New Roman", Times, serif; 
		margin:5px; 
		padding:10px;
		font-size:1.52em; 
		color:#999; 
		font-style:italic; 
		line-height:1.3em; 
		width:100%; 
		quotes:none;
	}
	blockquote.left {border-right:1px dashed #ccc; width:35%;} /* float blockquote left, and set width */
	blockquote.right {border-left:1px dashed #ccc; width:35%;} /* float blockquote right and set a width */

/* ** ** Header Styles ** ** */
h1, h2, h3, h4, h5 {margin:0 0 0.5em; line-height:1.1em;}
h1 {	font-size:2.52em;} 
h2 {	font-size:1.952em;} 
h3 {	font-size:1.652em;} 
h4 {	font-size:1.452em;} 
h5 {	font-size:1.252em;} 
h6 {	font-size:1.52em;}

/* ** ** ul li's ** ** */
ul li
{
	margin-left:20px;
}

/* ** ** custom select color ** ** */
::selection {
	background: #525252; /* Safari */
	}
::-moz-selection {
	background: #525252; /* Firefox */
	color:#fff;
}
/* ** ** paragraph styling ** ** */
p {margin:0 0 1.52em;}
	p img.left {float:left;margin:1.52em 1.52em 1.52em 0;padding:0;}
	p img.right {float:right;margin:1.52em 0 1.52em 1.52em;}

/* ** ** forms ** ** */
form fieldset {-webkit-border-radius: 5px; -moz-border-radius: 5px; border-radius:5px; padding-top:5px; padding-left:5px; border:1px solid #ccc; }
form fieldset legend {font-size:1.4em; padding:0 5px;}
form input[type=text], form input[type=email], form input[type=url], form input[type=password] {
		-moz-border-radius: 4px; 
		-webkit-border-radius: 4px; 
		border-radius:4px; 
		height:18px; 
		border:1px solid #000; 
		padding:4px 0 1px 5px;
		background-color: #cc9;
		}
form textarea
{
		-moz-border-radius: 4px; 
		-webkit-border-radius: 4px; 
		border-radius:4px; 
		background-color: #cc9;
		border:1px solid #000;
}
form label { display:block; height:20px; float: left; width: 125px; margin-right: 16px; }


strong   		{	font-weight:600;}
em, dfn  		{	font-style:italic;}
dfn 	 		{   font-weight:600;}
sup, sub 		{   line-height:0;}
abbr, acronym   {	border-bottom:1px dashed #ccc;}
address 		{	margin:0 0 1.5em;font-style:italic;}
del 			{	color:#666;}
pre, code, tt   {	font:1em 'andale mono', 'lucida console', monospace;line-height:1.5; display:block;}
code 			{	background-color:#d5d2d8; display:block; padding:0px 2px 4px 26px; background:#fff url(code.html) no-repeat left top; line-height:1.67em;}
pre 			{	margin:1.5em 0;white-space:pre;}





Hope for some help :S

a) font-size is only the physical font-size. The shorthand 52%/1.52em is actually 52% font-size, 1.52em line-height. Use separate properties for this, or specify the shorthand using font:, not font-size:

b) All of your CSS3 properties are not supported in CSS2.1 Take the validation errors with a grain of salt. Things like border radius, box shadow, etc.

c) Your selection CSS has to be applied to a specific element. You can do body:: or #main:: or whatever, but you still need to specify the element that it applies to.

Use separate properties for this, or specify the shorthand using font:, not font-size:

I’ll expand on this one a bit: Font is one of those shorthands who also demand a minimum amount of properties as well (some shorthands you can use anything, like background).

Font demands at the very least a font-size and a font-family. Everything else is optional.

but IE got all screewd,

You know also that not all IE’s know all that CSS right?