spacing of sociable plugin’s icons

hi
my sociable icons appear in a straight line at the end of my posts, between each icon there is whitespace about 15px wide. how can i space my icons more closely? ie: decreasing the whitespace.

i have looked at the stylesheet for the plugin but i am not sure which CSS class is responsible for this spacing.
My CSS stylesheet for the sociable plugin:

div.sociable { margin: 16px 0; }

span.sociable_tagline { position: relative; }
span.sociable_tagline span { display: none; width: 14em; }
span.sociable_tagline:hover span {
	position: absolute;
	display: block;
	top: -5em;
	background: #ffe;
	border: 1px solid #ccc;
	color: black;
	line-height: 1.25em;
}
.sociable span {
	display: block;
}
.sociable ul {
	display: inline;
	margin: 0 !important;
	padding: 0 !important;
}
.sociable ul li {
	background: none;
	display: inline !important;
	list-style-type: none;
	margin: 0;
	padding: 1px;
}
.sociable ul li:before { content: ""; }
.sociable img {
	float: none;
	width: 16px;
	height: 16px;
	border: 0;
	margin: 0;
	padding: 0;
}

.sociable-hovers {
	opacity: .4;
	-moz-opacity: .4;
	filter: alpha(opacity=40);
}
.sociable-hovers:hover {
	opacity: 1;
	-moz-opacity: 1;
	filter: alpha(opacity=100);
}

best regards
HH