diff --git a/src/fourthline/mabiicco/MabiIcco.java b/src/fourthline/mabiicco/MabiIcco.java
index e9e5c4e2..0f5c0c70 100644
--- a/src/fourthline/mabiicco/MabiIcco.java
+++ b/src/fourthline/mabiicco/MabiIcco.java
@@ -40,17 +40,13 @@ public void start(Stage stage) throws Exception {
 
 	public void initialize() {
 		try {
+			UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
+
 			// font
 			String fontName = AppResource.appText("ui.font");
 			if (!fontName.equals("ui.font")) {
 				setUIFont(new javax.swing.plaf.FontUIResource(fontName, Font.PLAIN, 11));
 			}
-			UIManager.LookAndFeelInfo infos[] = UIManager.getInstalledLookAndFeels();
-			for (UIManager.LookAndFeelInfo info : infos) {
-				System.out.println(info.getClassName());
-			}
-
-			UIManager.setLookAndFeel( UIManager.getSystemLookAndFeelClassName() );
 
 			// initialize
 			MabiDLS.getInstance().initializeMIDI();
diff --git a/src/fourthline/mabiicco/ui/MMLTrackView.java b/src/fourthline/mabiicco/ui/MMLTrackView.java
index e28e3194..9a6253ec 100644
--- a/src/fourthline/mabiicco/ui/MMLTrackView.java
+++ b/src/fourthline/mabiicco/ui/MMLTrackView.java
@@ -20,8 +20,6 @@
 
 import javax.swing.JTextField;
 import javax.swing.JComboBox;
-import javax.swing.event.DocumentEvent;
-import javax.swing.event.DocumentListener;
 
 import fourthline.mabiicco.AppResource;
 import fourthline.mabiicco.midi.InstClass;
@@ -35,7 +33,7 @@
 import java.util.EnumSet;
 import java.util.HashMap;
 
-public final class MMLTrackView extends JPanel implements ActionListener, DocumentListener {
+public final class MMLTrackView extends JPanel implements ActionListener {
 
 	private static final long serialVersionUID = 4955513242349170508L;
 	public static final String MMLPART_NAME[] = {
@@ -131,7 +129,6 @@ private MMLTrackView() {
 			mmlText[i] = new JTextField();
 			mmlText[i].setEditable(false);
 			mmlText[i].setFont(new Font("Monospaced", Font.PLAIN, 12));
-			mmlText[i].getDocument().addDocumentListener(this);
 			mmlText[i].setColumns(10);
 
 			GridBagConstraints gbc_mmlText = new GridBagConstraints();
@@ -229,17 +226,6 @@ public void setSelectMMLPartOfIndex(int index) {
 		partButton[index].setSelected(true);
 	}
 
-	@Override
-	public void removeUpdate(DocumentEvent event) {
-	}
-	@Override
-	public void insertUpdate(DocumentEvent event) {
-	}
-
-	@Override
-	public void changedUpdate(DocumentEvent event) {
-	}
-
 	public void updateTrack() {
 		MMLTrack mmlTrack = mmlManager.getMMLScore().getTrack(trackIndex);
 		String mml[] = mmlTrack.getMabiMMLArray();
@@ -294,6 +280,7 @@ private void updateProgramChangeStatus() {
 		} else {
 			songComboBox.setVisible(true);
 		}
+		updatePartButtonStatus();
 
 		InstClass songInst = ((InstClass) songComboBox.getSelectedItem());
 		int program = inst.getProgram();
@@ -303,7 +290,6 @@ private void updateProgramChangeStatus() {
 			return;
 		}
 
-		updatePartButtonStatus();
 		mmlManager.updateActiveTrackProgram(trackIndex, program, songProgram);
 	}