tsehov on "Problem with CSS (Chrome, Firefox and IE)"

I am constructing a webpage for a film festival. I work with Mac and both Safari and Chromium (latest versions) display my theme right, but when at work I use Windows. Firefox, Google Chrome and IE9 do not seem to read my template wide CSS properly.

Here is my CSS:

body {
	background-color: #111;
}
h3 {
	font-family: Verdana, Arial, Helvetica;
	font-size: 14px;
	color: #FFF;
	font-style: normal;
	line-height: normal;
	font-weight: normal;
	margin-left: 25px;
}
p {
	font-family: Verdana, Arial, Helvetica;
	font-size: 11px;
	color: #FFF;
	margin-left: 25px;
}
a:link {
	font-family: Verdana, Arial, Helvetica;
	font-size: 11px;
	text-decoration: none;
	color: #FFF;
}
a:hover {
	font-family: Verdana, Arial, Helvetica;
	font-size: 11px;
	text-decoration: underline;
	color: #FFF;
}
#lang_box {
	height: 20px;
	width: 300px;
	padding-left: 800px;
	padding-top: 45px;

}
.lang_link {
	font-family: Verdana, Geneva, sans-serif;
	font-size: 9px;
	color: #999;
	text-decoration: none;
  	letter-spacing: 0.8em;
}

Only Safari and Chromium show 'letter-spacing' and 'a:hover' in a right way, but it seems that all the other browsers just ignore those markups.

Can someone help me with this problem? Thanks in advance.