diff -Naur kdemultimedia-3.5.8.orig/kmix/kmix.cpp kdemultimedia-3.5.8/kmix/kmix.cpp
--- kdemultimedia-3.5.8.orig/kmix/kmix.cpp	2007-01-15 12:22:56.000000000 +0100
+++ kdemultimedia-3.5.8/kmix/kmix.cpp	2007-11-21 08:20:46.000000000 +0100
@@ -197,7 +197,7 @@
 
 		// create dock widget
                 // !! This should be a View in the future
-		m_dockWidget = new KMixDockWidget( Mixer::mixers().first(), this, "mainDockWidget", m_volumeWidget );
+		m_dockWidget = new KMixDockWidget( Mixer::mixers().first(), this, "mainDockWidget", m_volumeWidget, m_dockIconMuting );
 
 /* Belongs in KMixDockWidget
 		// create RMB menu
@@ -249,6 +249,7 @@
    config->writeEntry( "Tickmarks", m_showTicks );
    config->writeEntry( "Labels", m_showLabels );
    config->writeEntry( "startkdeRestore", m_onLogin );
+   config->writeEntry( "DockIconMuting", m_dockIconMuting );
    Mixer* mixerMasterCard = Mixer::masterCard();
    if ( mixerMasterCard != 0 ) {
       config->writeEntry( "MasterMixer", mixerMasterCard->id() );
@@ -298,6 +299,7 @@
    m_showLabels = config->readBoolEntry("Labels", true);
    const QString& valueStyleString = config->readEntry("ValueStyle", "None");
    m_onLogin = config->readBoolEntry("startkdeRestore", true );
+   m_dockIconMuting = config->readBoolEntry( "DockIconMuting", false);
    m_startVisible = config->readBoolEntry("Visible", true);
    m_multiDriverMode = config->readBoolEntry("MultiDriver", false);
    m_surroundView    = config->readBoolEntry("Experimental-ViewSurround", false );
@@ -428,6 +430,7 @@
       m_prefDlg->m_showTicks->setChecked( m_showTicks );
       m_prefDlg->m_showLabels->setChecked( m_showLabels );
       m_prefDlg->m_onLogin->setChecked( m_onLogin );
+      m_prefDlg->m_dockIconMuting->setChecked( m_dockIconMuting );
       m_prefDlg->_rbVertical  ->setChecked( m_toplevelOrientation == Qt::Vertical );
       m_prefDlg->_rbHorizontal->setChecked( m_toplevelOrientation == Qt::Horizontal );
       m_prefDlg->_rbNone->setChecked( m_valueStyle == MixDeviceWidget::NNONE );
@@ -497,6 +500,7 @@
    m_showTicks = prefDlg->m_showTicks->isChecked();
    m_showLabels = prefDlg->m_showLabels->isChecked();
    m_onLogin = prefDlg->m_onLogin->isChecked();
+   m_dockIconMuting = prefDlg->m_dockIconMuting->isChecked();
 
    if ( prefDlg->_rbNone->isChecked() ) {
      m_valueStyle = MixDeviceWidget::NNONE;
diff -Naur kdemultimedia-3.5.8.orig/kmix/kmix.h kdemultimedia-3.5.8/kmix/kmix.h
--- kdemultimedia-3.5.8.orig/kmix/kmix.h	2006-01-19 17:40:29.000000000 +0100
+++ kdemultimedia-3.5.8/kmix/kmix.h	2007-11-21 08:20:46.000000000 +0100
@@ -100,6 +100,7 @@
    bool m_volumeWidget;
    bool m_hideOnClose;
    bool m_showTicks;
+   bool m_dockIconMuting;
    bool m_showLabels;
    MixDeviceWidget::ValueStyle m_valueStyle;             // No numbers by default
    bool m_onLogin;
diff -Naur kdemultimedia-3.5.8.orig/kmix/kmixdockwidget.cpp kdemultimedia-3.5.8/kmix/kmixdockwidget.cpp
--- kdemultimedia-3.5.8.orig/kmix/kmixdockwidget.cpp	2006-03-17 11:11:42.000000000 +0100
+++ kdemultimedia-3.5.8/kmix/kmixdockwidget.cpp	2007-11-21 08:20:46.000000000 +0100
@@ -47,7 +47,7 @@
 #include "kwin.h"
 #include "viewdockareapopup.h"
 
-KMixDockWidget::KMixDockWidget( Mixer *mixer, QWidget *parent, const char *name, bool volumePopup )
+KMixDockWidget::KMixDockWidget( Mixer *mixer, QWidget *parent, const char *name, bool volumePopup, bool dockIconMuting )
     : KSystemTray( parent, name ),
       m_mixer(mixer),
       _dockAreaPopup(0L),
@@ -55,7 +55,8 @@
       _playBeepOnVolumeChange(false), // disabled due to triggering a "Bug"
       _oldToolTipValue(-1),
       _oldPixmapType('-'),
-      _volumePopup(volumePopup)
+      _volumePopup(volumePopup),
+      _dockIconMuting(dockIconMuting)
 {
     Mixer* preferredMasterMixer = Mixer::masterCard();
     if ( preferredMasterMixer != 0 ) {
@@ -294,7 +295,11 @@
 		return;
 	} // LeftMouseButton pressed
 	else if ( me->button() ==  MidButton ) {
-		toggleActive();
+		if ( ! _dockIconMuting ) {
+            toggleActive();
+        } else {
+            dockMute();
+        }
 		return;
 	}
 	else {
diff -Naur kdemultimedia-3.5.8.orig/kmix/kmixdockwidget.h kdemultimedia-3.5.8/kmix/kmixdockwidget.h
--- kdemultimedia-3.5.8.orig/kmix/kmixdockwidget.h	2006-01-19 17:40:29.000000000 +0100
+++ kdemultimedia-3.5.8/kmix/kmixdockwidget.h	2007-11-21 08:20:46.000000000 +0100
@@ -43,7 +43,7 @@
    friend class KMixWindow;
 
  public:
-   KMixDockWidget(Mixer *, QWidget *parent=0, const char *name=0, bool volumePopup=true);
+   KMixDockWidget(Mixer *, QWidget *parent=0, const char *name=0, bool volumePopup=true, bool dockIconMuting=false);
    ~KMixDockWidget();
 
    void setErrorPixmap();
@@ -73,6 +73,7 @@
    int  _oldToolTipValue;
    char _oldPixmapType;
    bool _volumePopup;
+   bool _dockIconMuting;
  private slots:
    void dockMute();
    void selectMaster();
diff -Naur kdemultimedia-3.5.8.orig/kmix/kmixprefdlg.cpp kdemultimedia-3.5.8/kmix/kmixprefdlg.cpp
--- kdemultimedia-3.5.8.orig/kmix/kmixprefdlg.cpp	2006-07-22 10:10:54.000000000 +0200
+++ kdemultimedia-3.5.8/kmix/kmixprefdlg.cpp	2007-11-21 08:20:46.000000000 +0100
@@ -67,7 +67,11 @@
 
    m_onLogin = new QCheckBox( i18n("Restore volumes on login"), m_generalTab );
    layout->addWidget( m_onLogin );
-
+   
+   m_dockIconMuting = new QCheckBox( 
+            i18n("Middle click on system tray icon toggles muting"), m_generalTab );
+   layout->addWidget( m_dockIconMuting );
+   
    QBoxLayout *numbersLayout = new QHBoxLayout( layout );
    QButtonGroup *numbersGroup = new QButtonGroup( 3, Qt::Horizontal, i18n("Numbers"), m_generalTab );
    numbersGroup->setRadioButtonExclusive(true);
diff -Naur kdemultimedia-3.5.8.orig/kmix/kmixprefdlg.h kdemultimedia-3.5.8/kmix/kmixprefdlg.h
--- kdemultimedia-3.5.8.orig/kmix/kmixprefdlg.h	2006-01-19 17:40:29.000000000 +0100
+++ kdemultimedia-3.5.8/kmix/kmixprefdlg.h	2007-11-21 08:20:46.000000000 +0100
@@ -57,6 +57,7 @@
    QCheckBox *m_showTicks;
    QCheckBox *m_showLabels;
    QCheckBox *m_onLogin;
+   QCheckBox *m_dockIconMuting;
    QRadioButton *_rbVertical;
    QRadioButton *_rbHorizontal;
    QRadioButton *_rbNone;