diff --git a/data/themes/default/style.css b/data/themes/default/style.css
index 1598264b9..005cc579d 100644
--- a/data/themes/default/style.css
+++ b/data/themes/default/style.css
@@ -83,13 +83,11 @@ QMenu::item:selected {
 	color: white;
 	font-weight:bold;
 	background-color: #747474;
-	margin:3px;
 }
 
 QMenu::item:disabled {
 	color: #747474;
 	background-color: #c9c9c9;
-	margin:0px;
 	font-size:12px;
 	font-weight: normal;
 	padding: 4px 32px 4px 20px;
diff --git a/include/AutomatableModel.h b/include/AutomatableModel.h
index db770890a..49e66c762 100644
--- a/include/AutomatableModel.h
+++ b/include/AutomatableModel.h
@@ -25,7 +25,7 @@
 #ifndef AUTOMATABLE_MODEL_H
 #define AUTOMATABLE_MODEL_H
 
-#include <math.h>
+#include "lmms_math.h"
 #include <QtCore/QMutex>
 
 #include "JournallingObject.h"
@@ -72,7 +72,8 @@ public:
 	enum ScaleType
 	{
 		Linear,
-		Logarithmic
+		Logarithmic,
+		Decibel
 	};
 
 	enum DataType
@@ -249,6 +250,19 @@ public:
 		return m_hasLinkedModels;
 	}
 
+	// a way to track changed values in the model and avoid using signals/slots - useful for speed-critical code.
+	// note that this method should only be called once per period since it resets the state of the variable - so if your model
+	// has to be accessed by more than one object, then this function shouldn't be used.
+	bool isValueChanged()
+	{
+		if( m_valueChanged )
+		{
+			m_valueChanged = false;
+			return true;
+		}
+		return false;
+	}
+
 	float globalAutomationValueAt( const MidiTime& time );
 	
 	bool hasStrictStepSize() const
@@ -318,6 +332,8 @@ private:
 	float m_step;
 	float m_range;
 	float m_centerValue;
+	
+	bool m_valueChanged;
 
 	// currently unused?
 	float m_oldValue;
diff --git a/include/FxMixer.h b/include/FxMixer.h
index 721f35250..f1ac405d0 100644
--- a/include/FxMixer.h
+++ b/include/FxMixer.h
@@ -59,6 +59,7 @@ class FxChannel : public ThreadableJob
 		QMutex m_lock;
 		int m_channelIndex; // what channel index are we
 		bool m_queued; // are we queued up for rendering yet?
+		bool m_muted; // are we muted? updated per period so we don't have to call m_muteModel.value() twice
 
 		// pointers to other channels that this one sends to
 		FxRouteVector m_sends;
@@ -69,6 +70,11 @@ class FxChannel : public ThreadableJob
 		virtual bool requiresProcessing() const { return true; }
 		void unmuteForSolo();
 
+	
+		QAtomicInt m_dependenciesMet;
+		void incrementDeps();
+		void processed();
+		
 	private:
 		virtual void doProcessing( sampleFrame * _working_buffer );
 };
@@ -196,10 +202,13 @@ private:
 	void allocateChannelsTo(int num);
 	QMutex m_sendsMutex;
 
+<<<<<<< HEAD
 	void addChannelLeaf( FxChannel * ch, sampleFrame * buf );
 
 	int m_lastSoloed;
 
+=======
+>>>>>>> stable-1.1
 	friend class MixerWorkerThread;
 	friend class FxMixerView;
 
diff --git a/include/ThreadableJob.h b/include/ThreadableJob.h
index 0a7655c51..c3da4c547 100644
--- a/include/ThreadableJob.h
+++ b/include/ThreadableJob.h
@@ -61,6 +61,11 @@ public:
 	{
 		m_state = Queued;
 	}
+	
+	inline void done()
+	{
+		m_state = Done;
+	}
 
 	void process( sampleFrame* workingBuffer = NULL )
 	{
diff --git a/include/caption_menu.h b/include/caption_menu.h
index 7bd3441c3..e8141e739 100644
--- a/include/caption_menu.h
+++ b/include/caption_menu.h
@@ -38,6 +38,12 @@ public:
 	captionMenu( const QString & _title, QWidget * _parent = 0 );
 	virtual ~captionMenu();
 
+	///
+	/// \brief Adds a "Help" action displaying the Menu's parent's WhatsThis
+	///		   text when selected.
+	///
+	void addHelpAction();
+
 } ;
 
 
diff --git a/plugins/BassBooster/BassBooster.cpp b/plugins/BassBooster/BassBooster.cpp
index dbbde8ff0..38a9bced3 100644
--- a/plugins/BassBooster/BassBooster.cpp
+++ b/plugins/BassBooster/BassBooster.cpp
@@ -52,6 +52,9 @@ BassBoosterEffect::BassBoosterEffect( Model* parent, const Descriptor::SubPlugin
 	m_bbFX( DspEffectLibrary::FastBassBoost( 70.0f, 1.0f, 2.8f ) ),
 	m_bbControls( this )
 {
+	changeFrequency();
+	changeGain();
+	changeRatio();
 }
 
 
@@ -70,6 +73,10 @@ bool BassBoosterEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames
 	{
 		return( false );
 	}
+	// check out changed controls
+	if( m_bbControls.m_freqModel.isValueChanged() ) { changeFrequency(); }
+	if( m_bbControls.m_gainModel.isValueChanged() ) { changeGain(); }
+	if( m_bbControls.m_ratioModel.isValueChanged() ) { changeRatio(); }
 
 	double outSum = 0.0;
 	const float d = dryLevel();
@@ -91,6 +98,32 @@ bool BassBoosterEffect::processAudioBuffer( sampleFrame* buf, const fpp_t frames
 }
 
 
+inline void BassBoosterEffect::changeFrequency()
+{
+	const sample_t fac = engine::mixer()->processingSampleRate() / 44100.0f;
+
+	m_bbFX.leftFX().setFrequency( m_bbControls.m_freqModel.value() * fac );
+	m_bbFX.rightFX().setFrequency( m_bbControls.m_freqModel.value() * fac );
+}
+
+
+
+
+inline void BassBoosterEffect::changeGain()
+{
+	m_bbFX.leftFX().setGain( m_bbControls.m_gainModel.value() );
+	m_bbFX.rightFX().setGain( m_bbControls.m_gainModel.value() );
+}
+
+
+
+
+inline void BassBoosterEffect::changeRatio()
+{
+	m_bbFX.leftFX().setRatio( m_bbControls.m_ratioModel.value() );
+	m_bbFX.rightFX().setRatio( m_bbControls.m_ratioModel.value() );
+}
+
 
 
 
diff --git a/plugins/BassBooster/BassBooster.h b/plugins/BassBooster/BassBooster.h
index b52302465..ad7c6c457 100644
--- a/plugins/BassBooster/BassBooster.h
+++ b/plugins/BassBooster/BassBooster.h
@@ -23,8 +23,8 @@
  */
 
 
-#ifndef _BASS_BOOSTER_H
-#define _BASS_BOOSTER_H
+#ifndef BASS_BOOSTER_H
+#define BASS_BOOSTER_H
 
 #include "Effect.h"
 #include "DspEffectLibrary.h"
@@ -45,6 +45,10 @@ public:
 
 
 private:
+	void changeFrequency();
+	void changeGain();
+	void changeRatio();
+
 	DspEffectLibrary::MonoToStereoAdaptor<DspEffectLibrary::FastBassBoost> m_bbFX;
 
 	BassBoosterControls m_bbControls;
diff --git a/plugins/BassBooster/BassBoosterControls.cpp b/plugins/BassBooster/BassBoosterControls.cpp
index 69a3952c7..13fd8463f 100644
--- a/plugins/BassBooster/BassBoosterControls.cpp
+++ b/plugins/BassBooster/BassBoosterControls.cpp
@@ -37,48 +37,17 @@ BassBoosterControls::BassBoosterControls( BassBoosterEffect* effect ) :
 	m_gainModel( 1.0f, 0.1f, 5.0f, 0.05f, this, tr( "Gain" ) ),
 	m_ratioModel( 2.0f, 0.1f, 10.0f, 0.1f, this, tr( "Ratio" ) )
 {
-	connect( &m_freqModel, SIGNAL( dataChanged() ), this, SLOT( changeFrequency() ) );
-	connect( &m_gainModel, SIGNAL( dataChanged() ), this, SLOT( changeGain() ) );
-	connect( &m_ratioModel, SIGNAL( dataChanged() ), this, SLOT( changeRatio() ) );
 	connect( engine::mixer(), SIGNAL( sampleRateChanged() ), this, SLOT( changeFrequency() ) );
-
-	changeFrequency();
-	changeGain();
-	changeRatio();
 }
 
 
-
-
 void BassBoosterControls::changeFrequency()
 {
-	const sample_t fac = engine::mixer()->processingSampleRate() / 44100.0f;
-
-	m_effect->m_bbFX.leftFX().setFrequency( m_freqModel.value() * fac );
-	m_effect->m_bbFX.rightFX().setFrequency( m_freqModel.value() * fac );
+	m_effect->changeFrequency();
 }
 
 
 
-
-void BassBoosterControls::changeGain()
-{
-	m_effect->m_bbFX.leftFX().setGain( m_gainModel.value() );
-	m_effect->m_bbFX.rightFX().setGain( m_gainModel.value() );
-}
-
-
-
-
-void BassBoosterControls::changeRatio()
-{
-	m_effect->m_bbFX.leftFX().setRatio( m_ratioModel.value() );
-	m_effect->m_bbFX.rightFX().setRatio( m_ratioModel.value() );
-}
-
-
-
-
 void BassBoosterControls::loadSettings( const QDomElement& _this )
 {
 	m_freqModel.loadSettings( _this, "freq" );
diff --git a/plugins/BassBooster/BassBoosterControls.h b/plugins/BassBooster/BassBoosterControls.h
index b26a31e18..5df888bc1 100644
--- a/plugins/BassBooster/BassBoosterControls.h
+++ b/plugins/BassBooster/BassBoosterControls.h
@@ -22,8 +22,8 @@
  *
  */
 
-#ifndef _BASSBOOSTER_CONTROLS_H
-#define _BASSBOOSTER_CONTROLS_H
+#ifndef BASSBOOSTER_CONTROLS_H
+#define BASSBOOSTER_CONTROLS_H
 
 #include "EffectControls.h"
 #include "BassBoosterControlDialog.h"
@@ -62,9 +62,6 @@ public:
 
 private slots:
 	void changeFrequency();
-	void changeGain();
-	void changeRatio();
-
 
 private:
 	BassBoosterEffect* m_effect;
@@ -73,7 +70,7 @@ private:
 	FloatModel m_ratioModel;
 
 	friend class BassBoosterControlDialog;
-
+	friend class BassBoosterEffect;
 } ;
 
 #endif
diff --git a/plugins/vibed/nine_button_selector.cpp b/plugins/vibed/nine_button_selector.cpp
index 2e5eb74c3..4fbdbf6c9 100644
--- a/plugins/vibed/nine_button_selector.cpp
+++ b/plugins/vibed/nine_button_selector.cpp
@@ -251,9 +251,8 @@ void nineButtonSelector::updateButton( int _new_button )
 
 void nineButtonSelector::contextMenuEvent( QContextMenuEvent * )
 {
-	captionMenu contextMenu( windowTitle() );
-	contextMenu.addAction( embed::getIconPixmap( "help" ), tr( "&Help" ),
-			       this, SLOT( displayHelp() ) );
+	captionMenu contextMenu( windowTitle(), this );
+	contextMenu.addHelpAction();
 	contextMenu.exec( QCursor::pos() );
 }
 
diff --git a/plugins/vibed/vibed.cpp b/plugins/vibed/vibed.cpp
index 7772e6d86..f2d0f0ed7 100644
--- a/plugins/vibed/vibed.cpp
+++ b/plugins/vibed/vibed.cpp
@@ -756,9 +756,8 @@ void vibedView::normalizeClicked()
 void vibedView::contextMenuEvent( QContextMenuEvent * )
 {
 
-	captionMenu contextMenu( model()->displayName() );
-	contextMenu.addAction( embed::getIconPixmap( "help" ), tr( "&Help" ),
-					this, SLOT( displayHelp() ) );
+	captionMenu contextMenu( model()->displayName(), this );
+	contextMenu.addHelpAction();
 	contextMenu.exec( QCursor::pos() );
 
 }
diff --git a/src/core/AutomatableModel.cpp b/src/core/AutomatableModel.cpp
index 544ebf9d6..0cc15c9f6 100644
--- a/src/core/AutomatableModel.cpp
+++ b/src/core/AutomatableModel.cpp
@@ -47,6 +47,7 @@ AutomatableModel::AutomatableModel( DataType type,
 	m_step( step ),
 	m_range( max - min ),
 	m_centerValue( m_minValue ),
+	m_valueChanged( false ),
 	m_setValueDepth( 0 ),
 	m_hasStrictStepSize( false ),
 	m_hasLinkedModels( false ),
@@ -240,6 +241,7 @@ void AutomatableModel::setValue( const float value )
 				(*it)->setJournalling( journalling );
 			}
 		}
+		m_valueChanged = true;
 		emit dataChanged();
 	}
 	else
@@ -334,6 +336,7 @@ void AutomatableModel::setAutomatedValue( const float value )
 				(*it)->setAutomatedValue( value );
 			}
 		}
+		m_valueChanged = true;
 		emit dataChanged();
 	}
 	--m_setValueDepth;
@@ -478,6 +481,7 @@ void AutomatableModel::setControllerConnection( ControllerConnection* c )
 	{
 		QObject::connect( m_controllerConnection, SIGNAL( valueChanged() ), this, SIGNAL( dataChanged() ) );
 		QObject::connect( m_controllerConnection, SIGNAL( destroyed() ), this, SLOT( unlinkControllerConnection() ) );
+		m_valueChanged = true;
 		emit dataChanged();
 	}
 }
diff --git a/src/core/FxMixer.cpp b/src/core/FxMixer.cpp
index 55f18a286..9c52700d1 100644
--- a/src/core/FxMixer.cpp
+++ b/src/core/FxMixer.cpp
@@ -70,7 +70,8 @@ FxChannel::FxChannel( int idx, Model * _parent ) :
 	m_name(),
 	m_lock(),
 	m_channelIndex( idx ),
-	m_queued( false )
+	m_queued( false ),
+	m_dependenciesMet( 0 )
 {
 	engine::mixer()->clearAudioBuffer( m_buffer,
 					engine::mixer()->framesPerPeriod() );
@@ -85,6 +86,27 @@ FxChannel::~FxChannel()
 }
 
 
+inline void FxChannel::processed()
+{
+	foreach( FxRoute * receiverRoute, m_sends )
+	{
+		if( receiverRoute->receiver()->m_muted == false )
+		{
+			receiverRoute->receiver()->incrementDeps();
+		}
+	}
+}
+
+void FxChannel::incrementDeps()
+{
+	m_dependenciesMet.ref();
+	if( m_dependenciesMet >= m_receives.size() )
+	{
+		m_queued = true;
+		MixerWorkerThread::addJob( this );
+		m_dependenciesMet = 0;
+	}
+}
 
 void FxChannel::unmuteForSolo()
 {
@@ -107,25 +129,14 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 	// <tobydox> this improves cache hit rate
 	_buf = m_buffer;
 
-	if( m_muteModel.value() == false )
+	if( m_muted == false )
 	{
-		// OK, we are not muted, so we go recursively through all the channels
-		// which send to us (our children)...
 		foreach( FxRoute * senderRoute, m_receives )
 		{
 			FxChannel * sender = senderRoute->sender();
 			FloatModel * sendModel = senderRoute->amount();
 			if( ! sendModel ) qFatal( "Error: no send model found from %d to %d", senderRoute->senderIndex(), m_channelIndex );
 
-			// wait for the sender job - either it's just been queued yet,
-			// then ThreadableJob::process() will process it now within this
-			// thread - otherwise it has been is is being processed by another
-			// thread and we just have to wait for it to finish
-			while( sender->state() != ThreadableJob::Done )
-			{
-				sender->process();
-			}
-
 			if( sender->m_hasInput || sender->m_stillRunning )
 			{
 				// figure out if we're getting sample-exact input
@@ -158,20 +169,28 @@ void FxChannel::doProcessing( sampleFrame * _buf )
 				m_hasInput = true;
 			}
 		}
+
+
+		const float v = m_volumeModel.value();
+
+		if( m_hasInput )
+		{
+			// only start fxchain when we have input...
+			m_fxChain.startRunning();
+		}
+		
+		m_stillRunning = m_fxChain.processAudioBuffer( _buf, fpp, m_hasInput );
+
+		m_peakLeft = qMax( m_peakLeft, engine::mixer()->peakValueLeft( _buf, fpp ) * v );
+		m_peakRight = qMax( m_peakRight, engine::mixer()->peakValueRight( _buf, fpp ) * v );
 	}
-
-	const float v = m_volumeModel.value();
-
-	if( m_hasInput )
+	else
 	{
-		// only start fxchain when we have input...
-		m_fxChain.startRunning();
+		m_peakLeft = m_peakRight = 0.0f;
 	}
 	
-	m_stillRunning = m_fxChain.processAudioBuffer( _buf, fpp, m_hasInput );
-
-	m_peakLeft = qMax( m_peakLeft, engine::mixer()->peakValueLeft( _buf, fpp ) * v );
-	m_peakRight = qMax( m_peakRight, engine::mixer()->peakValueRight( _buf, fpp ) * v );
+	// increment dependency counter of all receivers 
+	processed();
 }
 
 
@@ -456,11 +475,9 @@ void FxMixer::deleteChannelSend( FxRoute * route )
 bool FxMixer::isInfiniteLoop( fx_ch_t sendFrom, fx_ch_t sendTo )
 {
 	if( sendFrom == sendTo ) return true;
-	//m_sendsMutex.lock();
 	FxChannel * from = m_fxChannels[sendFrom];
 	FxChannel * to = m_fxChannels[sendTo];
 	bool b = checkInfiniteLoop( from, to );
-	//m_sendsMutex.unlock();
 	return b;
 }
 
@@ -538,42 +555,38 @@ void FxMixer::prepareMasterMix()
 
 
 
-void FxMixer::addChannelLeaf( FxChannel * ch, sampleFrame * buf )
-{
-	// if we're muted or this channel is seen already, discount it
-	if( ch->m_queued )
-	{
-		return;
-	}
-
-	foreach( FxRoute * senderRoute, ch->m_receives )
-	{
-		addChannelLeaf( senderRoute->sender(), buf );
-	}
-
-	// add this channel to job list
-	ch->m_queued = true;
-	MixerWorkerThread::addJob( ch );
-}
-
-
-
 void FxMixer::masterMix( sampleFrame * _buf )
 {
 	const int fpp = engine::mixer()->framesPerPeriod();
 
-	// recursively loop through channel dependency chain
-	// and add all channels to job list that have no dependencies
-	// when the channel completes it will check its parent to see if it needs
-	// to be processed.
-	//m_sendsMutex.lock();
-	MixerWorkerThread::resetJobQueue( MixerWorkerThread::JobQueue::Dynamic );
-	addChannelLeaf( m_fxChannels[0], _buf );
-	while( m_fxChannels[0]->state() != ThreadableJob::Done )
+	if( m_sendsMutex.tryLock() )
 	{
-		MixerWorkerThread::startAndWaitForJobs();
+		// add the channels that have no dependencies (no incoming senders, ie. no receives)
+		// to the jobqueue. The channels that have receives get added when their senders get processed, which
+		// is detected by dependency counting.
+		// also instantly add all muted channels as they don't need to care about their senders, and can just increment the deps of
+		// their recipients right away.
+		MixerWorkerThread::resetJobQueue( MixerWorkerThread::JobQueue::Dynamic );
+		foreach( FxChannel * ch, m_fxChannels )
+		{
+			ch->m_muted = ch->m_muteModel.value();
+			if( ch->m_muted ) // instantly "process" muted channels
+			{
+				ch->processed();
+				ch->done();
+			}
+			else if( ch->m_receives.size() == 0 )
+			{
+				ch->m_queued = true;
+				MixerWorkerThread::addJob( ch );
+			}
+		}
+		while( m_fxChannels[0]->state() != ThreadableJob::Done )
+		{
+			MixerWorkerThread::startAndWaitForJobs();
+		}
+		m_sendsMutex.unlock();
 	}
-	//m_sendsMutex.unlock();
 
 	// handle sample-exact data in master volume fader
 	ValueBuffer * volBuf = m_fxChannels[0]->m_volumeModel.valueBuffer();
diff --git a/src/core/track.cpp b/src/core/track.cpp
index b6640937f..3f60713e4 100644
--- a/src/core/track.cpp
+++ b/src/core/track.cpp
@@ -1044,7 +1044,7 @@ void trackContentWidget::updateBackground()
 	// draw lines
 	pmp.setPen( QPen( QColor( 0, 0, 0, 160 ), 1 ) );
 	// horizontal line
-	pmp.drawLine( 0, 0, w*2, 0 );
+	pmp.drawLine( 0, h-1, w*2, h-1 );
 
 	// vertical lines
 	for( float x = 0; x < w * 2; x += ppt )
diff --git a/src/gui/widgets/ControllerView.cpp b/src/gui/widgets/ControllerView.cpp
index 05f9ba17d..3d0185ab4 100644
--- a/src/gui/widgets/ControllerView.cpp
+++ b/src/gui/widgets/ControllerView.cpp
@@ -176,14 +176,12 @@ void ControllerView::modelChanged()
 
 void ControllerView::contextMenuEvent( QContextMenuEvent * )
 {
-	QPointer<captionMenu> contextMenu = new captionMenu( model()->displayName() );
+	QPointer<captionMenu> contextMenu = new captionMenu( model()->displayName(), this );
 	contextMenu->addAction( embed::getIconPixmap( "cancel" ),
 						tr( "&Remove this plugin" ),
 						this, SLOT( deleteController() ) );
 	contextMenu->addSeparator();
-	contextMenu->addAction( embed::getIconPixmap( "help" ),
-						tr( "&Help" ),
-						this, SLOT( displayHelp() ) );
+	contextMenu->addHelpAction();
 	contextMenu->exec( QCursor::pos() );
 	delete contextMenu;
 }
diff --git a/src/gui/widgets/EffectView.cpp b/src/gui/widgets/EffectView.cpp
index 17e0daed8..3ecb785c3 100644
--- a/src/gui/widgets/EffectView.cpp
+++ b/src/gui/widgets/EffectView.cpp
@@ -245,7 +245,7 @@ void EffectView::closeEffects()
 
 void EffectView::contextMenuEvent( QContextMenuEvent * )
 {
-	QPointer<captionMenu> contextMenu = new captionMenu( model()->displayName() );
+	QPointer<captionMenu> contextMenu = new captionMenu( model()->displayName(), this );
 	contextMenu->addAction( embed::getIconPixmap( "arp_up" ),
 						tr( "Move &up" ),
 						this, SLOT( moveUp() ) );
@@ -257,9 +257,7 @@ void EffectView::contextMenuEvent( QContextMenuEvent * )
 						tr( "&Remove this plugin" ),
 						this, SLOT( deletePlugin() ) );
 	contextMenu->addSeparator();
-	contextMenu->addAction( embed::getIconPixmap( "help" ),
-						tr( "&Help" ),
-						this, SLOT( displayHelp() ) );
+	contextMenu->addHelpAction();
 	contextMenu->exec( QCursor::pos() );
 	delete contextMenu;
 }
diff --git a/src/gui/widgets/FxLine.cpp b/src/gui/widgets/FxLine.cpp
index e940694c0..b97e551d7 100644
--- a/src/gui/widgets/FxLine.cpp
+++ b/src/gui/widgets/FxLine.cpp
@@ -183,7 +183,7 @@ void FxLine::mouseDoubleClickEvent( QMouseEvent * )
 void FxLine::contextMenuEvent( QContextMenuEvent * )
 {
 	FxMixer * mix = engine::fxMixer();
-	QPointer<captionMenu> contextMenu = new captionMenu( mix->effectChannel( m_channelIndex )->m_name );
+	QPointer<captionMenu> contextMenu = new captionMenu( mix->effectChannel( m_channelIndex )->m_name, this );
 	if( m_channelIndex != 0 ) // no move-options in master 
 	{
 		contextMenu->addAction( tr( "Move &left" ),	this, SLOT( moveChannelLeft() ) );
@@ -199,9 +199,7 @@ void FxLine::contextMenuEvent( QContextMenuEvent * )
 		contextMenu->addSeparator();
 	}
 	
-	contextMenu->addAction( embed::getIconPixmap( "help" ),
-						tr( "&Help" ),
-						this, SLOT( displayHelp() ) );
+	contextMenu->addHelpAction();
 	contextMenu->exec( QCursor::pos() );
 	delete contextMenu;
 }
diff --git a/src/gui/widgets/caption_menu.cpp b/src/gui/widgets/caption_menu.cpp
index 3c2540823..2ae6b5a91 100644
--- a/src/gui/widgets/caption_menu.cpp
+++ b/src/gui/widgets/caption_menu.cpp
@@ -24,6 +24,7 @@
 
 
 #include "caption_menu.h"
+#include "embed.h"
 
 
 
@@ -45,6 +46,19 @@ captionMenu::~captionMenu()
 
 
 
+void captionMenu::addHelpAction()
+{
+	QWidget* parent = (QWidget*) this->parent();
 
+	if (parent == NULL)
+		return;
 
-
+	if (! parent->whatsThis().isEmpty()) {
+		addAction( embed::getIconPixmap( "help" ), tr( "&Help" ),
+							parent, SLOT( displayHelp() ) );
+	}
+	else {
+		QAction* helpAction = addAction( embed::getIconPixmap("help"), tr("Help (not available)") );
+		helpAction->setDisabled(true);
+	}
+}
diff --git a/src/gui/widgets/knob.cpp b/src/gui/widgets/knob.cpp
index f4e808554..60acf72e1 100644
--- a/src/gui/widgets/knob.cpp
+++ b/src/gui/widgets/knob.cpp
@@ -481,11 +481,10 @@ void knob::contextMenuEvent( QContextMenuEvent * )
 	// an QApplication::restoreOverrideCursor()-call...
 	mouseReleaseEvent( NULL );
 
-	captionMenu contextMenu( model()->displayName() );
+	captionMenu contextMenu( model()->displayName(), this );
 	addDefaultActions( &contextMenu );
 	contextMenu.addSeparator();
-	contextMenu.addAction( embed::getIconPixmap( "help" ), tr( "&Help" ),
-						this, SLOT( displayHelp() ) );
+	contextMenu.addHelpAction();
 	contextMenu.exec( QCursor::pos() );
 }
 
diff --git a/src/gui/widgets/tempo_sync_knob.cpp b/src/gui/widgets/tempo_sync_knob.cpp
index 36820c4ad..1131ba441 100644
--- a/src/gui/widgets/tempo_sync_knob.cpp
+++ b/src/gui/widgets/tempo_sync_knob.cpp
@@ -83,7 +83,7 @@ void TempoSyncKnob::contextMenuEvent( QContextMenuEvent * )
 {
 	mouseReleaseEvent( NULL );
 
-	captionMenu contextMenu( model()->displayName() );
+	captionMenu contextMenu( model()->displayName(), this );
 	addDefaultActions( &contextMenu );
 	contextMenu.addSeparator();
 	
@@ -147,9 +147,7 @@ void TempoSyncKnob::contextMenuEvent( QContextMenuEvent * )
 
 	}
 
-	contextMenu.addSeparator();
-	contextMenu.addAction( embed::getIconPixmap( "help" ), tr( "&Help" ),
-						this, SLOT( displayHelp() ) );
+	contextMenu.addHelpAction();
 	contextMenu.exec( QCursor::pos() );
 	
 	delete syncMenu;
diff --git a/src/tracks/InstrumentTrack.cpp b/src/tracks/InstrumentTrack.cpp
index 66f0c75a8..dfc4e9278 100644
--- a/src/tracks/InstrumentTrack.cpp
+++ b/src/tracks/InstrumentTrack.cpp
@@ -806,6 +806,7 @@ void InstrumentTrack::loadTrackSpecificSettings( const QDomElement & thisElement
 		}
 		node = node.nextSibling();
 	}
+	updatePitchRange();
 	unlock();
 }
 
@@ -1585,10 +1586,3 @@ void InstrumentTrackWindow::loadSettings( const QDomElement& thisElement )
 		m_itv->m_tlb->setChecked( true );
 	}
 }
-
-
-
-
-
-
-