[Skyrider]

I think there's something wrong...

Your modification says to find the following:

.postbitlegacy .userinfo {
	float:{vb:stylevar left};
	position: relative;
	width:{vb:math {vb:stylevar postbitlegacy_userinfo_width}-{vb:math {vb:stylevar 
padding}*2}}; 
	padding: 2px {vb:stylevar padding} {vb:math {vb:stylevar padding}/2};
	font-size: {vb:stylevar small_fontSize};
	display:block;
}

How ever, I found this:

.postbitlegacy .userinfo {
	float:{vb:stylevar left};
	position: relative;
	width:{vb:math {vb:stylevar postbitlegacy_userinfo_width}-{vb:math {vb:stylevar padding}*2}}; 
	padding: 2px {vb:stylevar padding} {vb:math {vb:stylevar padding}/2};
	font-size: {vb:stylevar small_fontSize};
	display:block;
        background: {vb:stylevar postbit_userinfo_background};
	_background-image: none;
	_margin-top: -{vb:math {vb:math 16px*{vb:stylevar line_height}} + {vb:stylevar padding}-{vb:stylevar postbit_border.borderWidth}};
	clear:both;
}

As you can see, the original is much longer so I think the installation instructions has to be adjusted.