Index: lams_central/web/includes/javascript/main.js
===================================================================
diff -u -r15a0a16d66153b4f57df055b38b2c3143445b5fa -r97deffe165055d02a9942930ec547b5ee040dc42
--- lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 15a0a16d66153b4f57df055b38b2c3143445b5fa)
+++ lams_central/web/includes/javascript/main.js	(.../main.js)	(revision 97deffe165055d02a9942930ec547b5ee040dc42)
@@ -446,6 +446,13 @@
 		},
 		success : function(count) {
 			$('#notificationsPendingCount').text(count == 0 ? '0' : count);
+			
+			//#notificationsPendingCount will have .btn-primary class when there are some messages available and .btn-default otherwise
+			if (count == 0) {
+				$('#notificationsPendingCount').removeClass("btn-primary").addClass("btn-default");
+			} else {
+				$('#notificationsPendingCount').removeClass("btn-default").addClass("btn-primary");
+			}
 		}
 	});
 }