the post background doesn't match the rest of the website 

 and the borders around the logo and sidebars are really blurred, and nothing lines up or anything 

 and why is there so much CSS for IE? it's like a completely different website when you change browsers 

 also, you have two headers 
code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
<title>Th3rmals Space</title> 
</head> 
 
<body> 
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> 
<link  rel="stylesheet" type="text/css" href="ff.css" /> 
 
<title>Th3rmals Space</title> 
</head> 
 
<body>