Index: styles/prosilver/theme/cp.css
===================================================================
--- styles/prosilver/theme/cp.css	(revision 10327)
+++ styles/prosilver/theme/cp.css	(working copy)
@@ -395,11 +395,15 @@
 .pmlist li.bg1 {
 	border: solid 3px transparent;
 	border-width: 0 3px;
+	border-left-color: #ecf3f7;
+	border-right-color: #ecf3f7;
 }
 
 .pmlist li.bg2 {
 	border: solid 3px transparent;
 	border-width: 0 3px;
+	border-left-color: #e1ebf2;
+	border-right-color: #e1ebf2;
 }
 
 .pmlist li.pm_message_reported_colour, .pm_message_reported_colour {