diff --git a/mailnews/ui/messenger/resources/common.css b/mailnews/ui/messenger/resources/common.css
index da7f1397db6e..a1d783d4786c 100644
--- a/mailnews/ui/messenger/resources/common.css
+++ b/mailnews/ui/messenger/resources/common.css
@@ -1,49 +1,49 @@
-window {
-	display: block;
-	width: 100%;
-	background-color: black;
-}
-
-tree {
-	display: table;
-	background-color: #000000;
-	border: none;
-	border-spacing: 0px;
-	border-collapse: collapse;
-	width: 100%;
-}
-
-treerow {
-	display: table-row;
-}
-
-treehead {
-	display: table-header-group;
-}
-
-treebody {
-	display: table-row-group;
-	
-}
-
-treecell {
-	display: table-cell;
-	color: white;
-	font-family: Verdana;
-	font-size: 10pt;
-}
-
-treehead treerow treecell {
-	background-color: #a0a0a0;
-	border: thin black solid;
-	color: black;
-}
-
-icon {
-	display: list-item;
-	list-style-image: url(http://www.shadowland.org/client/images/ClosedRead.gif);
-}
-
-:TREE-SELECTION {
-	background-color: #000080;
+window {
+	display: block;
+	width: 100%;
+	background-color: black;
+}
+
+tree {
+	display: table;
+	background-color: #000000;
+	border: none;
+	border-spacing: 0px;
+	//border-collapse: collapse;
+	width: 100%;
+}
+
+treeitem {
+	display: table-row;
+}
+
+treehead {
+	display: table-header-group;
+}
+
+treebody {
+	display: table-row-group;
+	
+}
+
+treecell {
+	display: table-cell;
+	color: white;
+	font-family: Verdana;
+	font-size: 10pt;
+}
+
+treehead treeitem treecell {
+	background-color: #a0a0a0;
+	border: thin black solid;
+	color: black;
+}
+
+icon {
+	display: list-item;
+	list-style-image: url(http://www.shadowland.org/client/images/ClosedRead.gif);
+}
+
+treecell[selected] {
+	background-color: #000080;
 }
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