diff --git a/include/Engine.h b/include/Engine.h
index 5106222dc..03314a5d8 100644
--- a/include/Engine.h
+++ b/include/Engine.h
@@ -58,16 +58,6 @@ public:
 
 	static bool hasGUI();
 
-	static void setSuppressMessages( bool _on )
-	{
-		s_suppressMessages = _on;
-	}
-
-	static bool suppressMessages()
-	{
-		return !hasGUI() || s_suppressMessages;
-	}
-
 	// core
 	static Mixer *mixer()
 	{
@@ -127,7 +117,7 @@ private:
 		delete tmp;
 	}
 
-	static bool s_suppressMessages;
+	static bool s_hasGUI;
 	static float s_framesPerTick;
 
 	// core
diff --git a/plugins/LadspaEffect/LadspaEffect.cpp b/plugins/LadspaEffect/LadspaEffect.cpp
index 9dc3774bc..8906b9578 100644
--- a/plugins/LadspaEffect/LadspaEffect.cpp
+++ b/plugins/LadspaEffect/LadspaEffect.cpp
@@ -39,6 +39,7 @@
 #include "ControllerConnection.h"
 #include "MemoryManager.h"
 #include "ValueBuffer.h"
+#include "MainWindow.h"
 
 #include "embed.cpp"
 
@@ -74,12 +75,11 @@ LadspaEffect::LadspaEffect( Model * _parent,
 	Ladspa2LMMS * manager = Engine::getLADSPAManager();
 	if( manager->getDescription( m_key ) == NULL )
 	{
-		if( !Engine::suppressMessages() )
+		if ( Engine::hasGUI() )
 		{
-			QMessageBox::warning( 0, tr( "Effect" ), 
-				tr( "Unknown LADSPA plugin %1 requested." ).
-							arg( m_key.second ),
-				QMessageBox::Ok, QMessageBox::NoButton );
+			Engine::mainWindow()->collectError(
+				tr( "Unknown LADSPA plugin %1 requested." ).arg(
+					m_key.second ) );
 		}
 		setOkay( false );
 		return;
diff --git a/src/core/Engine.cpp b/src/core/Engine.cpp
index cbe826bed..2f2b3ba1c 100644
--- a/src/core/Engine.cpp
+++ b/src/core/Engine.cpp
@@ -40,8 +40,7 @@
 
 #include "GuiApplication.h"
 
-
-bool Engine::s_suppressMessages = false;
+bool Engine::s_hasGUI = true;
 float Engine::s_framesPerTick;
 Mixer* Engine::s_mixer = NULL;
 FxMixer * Engine::s_fxMixer = NULL;
diff --git a/src/core/PresetPreviewPlayHandle.cpp b/src/core/PresetPreviewPlayHandle.cpp
index 69b550fdc..09ebaca16 100644
--- a/src/core/PresetPreviewPlayHandle.cpp
+++ b/src/core/PresetPreviewPlayHandle.cpp
@@ -126,8 +126,6 @@ PresetPreviewPlayHandle::PresetPreviewPlayHandle( const QString & _preset_file,
 	const bool j = Engine::projectJournal()->isJournalling();
 	Engine::projectJournal()->setJournalling( false );
 
-	Engine::setSuppressMessages( true );
-
 	if( _load_by_plugin )
 	{
 		Instrument * i = s_previewTC->previewInstrumentTrack()->instrument();
@@ -162,8 +160,6 @@ PresetPreviewPlayHandle::PresetPreviewPlayHandle( const QString & _preset_file,
 		}
 	}
 
-	Engine::setSuppressMessages( false );
-
 	// make sure, our preset-preview-track does not appear in any MIDI-
 	// devices list, so just disable receiving/sending MIDI-events at all
 	s_previewTC->previewInstrumentTrack()->