diff -Naur kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/applet.cpp kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/applet.cpp
--- kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/applet.cpp	2010-01-31 20:30:44.000000000 +0100
+++ kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/applet.cpp	2010-02-01 22:39:20.000000000 +0100
@@ -189,7 +189,7 @@
     m_taskArea->setAlwaysShownTypes(alwaysShownTypes);
 
     m_shownCategories.clear();
-
+    
     if (cg.readEntry("ShowApplicationStatus", true)) {
         m_shownCategories.insert(Task::ApplicationStatus);
     }
@@ -216,6 +216,9 @@
 
     KConfigGroup globalCg = globalConfig();
     bool createExtenderTask = false;
+    
+    m_notificationsHistory = globalCg.readEntry("NotificationsHistory", true);
+    
     if (globalCg.readEntry("ShowJobs", true)) {
         createExtenderTask = true;
         createJobGroups();
@@ -275,7 +278,7 @@
         return;
     }
 
-    if (s_manager->notifications().count() > 0) {
+    if (s_manager->notifications().count() > 0 && m_notificationsHistory) {
         if (!extender()->group("oldNotificationsGroup")) {
             Plasma::ExtenderGroup *group = new Plasma::ExtenderGroup(extender());
             group->setName("oldNotificationsGroup");
@@ -578,6 +581,7 @@
 
         m_notificationUi.showJobs->setChecked(globalCg.readEntry("ShowJobs", true));
         m_notificationUi.showNotifications->setChecked(globalCg.readEntry("ShowNotifications", true));
+        m_notificationUi.notificationsHistory->setChecked(globalCg.readEntry("NotificationsHistory", true));
 
         m_notificationUi.showApplicationStatus->setChecked(globalCg.readEntry("ShowApplicationStatus", true));
         m_notificationUi.showCommunications->setChecked(globalCg.readEntry("ShowCommunications", true));
@@ -681,6 +685,7 @@
     KConfigGroup globalCg = globalConfig();
     globalCg.writeEntry("ShowJobs", m_notificationUi.showJobs->isChecked());
     globalCg.writeEntry("ShowNotifications", m_notificationUi.showNotifications->isChecked());
+    globalCg.writeEntry("NotificationsHistory", m_notificationUi.notificationsHistory->isChecked());
     globalCg.writeEntry("ShowApplicationStatus", m_notificationUi.showApplicationStatus->isChecked());
     globalCg.writeEntry("ShowCommunications", m_notificationUi.showCommunications->isChecked());
     globalCg.writeEntry("ShowSystemServices", m_notificationUi.showSystemServices->isChecked());
@@ -749,40 +754,42 @@
     } else {
         showPopup(m_autoHideTimeout);
     }
-
-
-    bool found = false;
-    for (int i = 0; i < m_notificationBar.data()->count(); ++i) {
-        if (m_notificationBar.data()->tabText(i) == notification->applicationName()) {
-            found = true;
-            break;
-        }
-    }
-
-    QList<Notification *> &appNotifications = m_notificationsForApp[notification->applicationName()];
-    if (!appNotifications.contains(notification)) {
-        appNotifications.append(notification);
-        //FIXME: arbitrary limit
-        if (appNotifications.count() > 10) {
-            Notification *oldNotification = appNotifications.first();
-            appNotifications.pop_front();
-            oldNotification->deleteLater();
-        }
+    
+    if (m_notificationsHistory) {
+        
+	bool found = false;
+	for (int i = 0; i < m_notificationBar.data()->count(); ++i) {
+	    if (m_notificationBar.data()->tabText(i) == notification->applicationName()) {
+		found = true;
+		break;
+	    }
+	}
+	
+	QList<Notification *> &appNotifications = m_notificationsForApp[notification->applicationName()];
+	if (!appNotifications.contains(notification)) {
+	    appNotifications.append(notification);
+	    //FIXME: arbitrary limit
+	    if (appNotifications.count() > 10) {
+		Notification *oldNotification = appNotifications.first();
+		appNotifications.pop_front();
+		oldNotification->deleteLater();
+	    }
+	}
+
+	if (!m_recentNotifications.contains(notification)) {
+	    m_recentNotifications.append(notification);
+	    while (m_recentNotifications.count() > 10) {
+		Notification *oldNotification = m_recentNotifications.first();
+		m_recentNotifications.pop_front();
+		oldNotification->hide();
+	    }
+	}
+
+	if (!found) {
+	    m_notificationBar.data()->addTab(notification->applicationIcon(), notification->applicationName());
+	}
     }
-
-    if (!m_recentNotifications.contains(notification)) {
-        m_recentNotifications.append(notification);
-        while (m_recentNotifications.count() > 10) {
-            Notification *oldNotification = m_recentNotifications.first();
-            m_recentNotifications.pop_front();
-            oldNotification->hide();
-        }
-    }
-
-    if (!found) {
-        m_notificationBar.data()->addTab(notification->applicationIcon(), notification->applicationName());
-    }
-
+    
     disconnect(notification, 0, this, 0);
     connect(notification, SIGNAL(notificationDestroyed(SystemTray::Notification *)), this, SLOT(notificationDestroyed(SystemTray::Notification *)));
 
diff -Naur kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/applet.h kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/applet.h
--- kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/applet.h	2010-01-20 00:19:14.000000000 +0100
+++ kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/applet.h	2010-02-01 22:39:20.000000000 +0100
@@ -113,6 +113,7 @@
     JobTotalsWidget *m_jobSummaryWidget;
     int m_autoHideTimeout;
     int m_timerId;
+    bool m_notificationsHistory;
 
     QHash<QString, QList<Notification*> > m_notificationsForApp;
     QList<Notification*> m_recentNotifications;
diff -Naur kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/protocols.ui kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/protocols.ui
--- kdebase-workspace-4.3.98.orig/plasma/generic/applets/systemtray/ui/protocols.ui	2009-09-16 13:40:54.000000000 +0200
+++ kdebase-workspace-4.3.98/plasma/generic/applets/systemtray/ui/protocols.ui	2010-02-01 22:39:20.000000000 +0100
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>213</width>
-    <height>236</height>
+    <width>455</width>
+    <height>498</height>
    </rect>
   </property>
   <layout class="QFormLayout" name="formLayout">
@@ -158,6 +158,20 @@
      </property>
     </spacer>
    </item>
+   <item row="5" column="0">
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Notifications history</string>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="1">
+    <widget class="QCheckBox" name="notificationsHistory">
+     <property name="text">
+      <string/>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources/>