proper disposal issue fixed; error while screen is not paused but not

renrendering (ex. dragging window) fixed;

core/src/zero1hd/rhythmbullet/RhythmBullet.java

@@ -193,13 +193,13 @@ public class RhythmBullet extends Game {
 	public void dispose() {
 		Gdx.app.debug("Core", "disposing...");
 		try {
+			getScreen().dispose();
 			skinAtlas.dispose();
 			getSkin().dispose();
 			assetManager.dispose();
-			getScreen().dispose();
 			assetPack.dispose();
 		} catch (NullPointerException npe) {
-			//Means the game was closed before everything was initiated.
+			Gdx.app.debug("Core", "Disposal error occurred, possibly caused by failing to complete initialization.", npe);
 		}
 		super.dispose();
 	}

desktop/src/zero1hd/rhythmbullet/desktop/audio/PCMObtainer.java

@@ -113,9 +113,12 @@ public class PCMObtainer implements Observer, PCMSystem {
 	}
 
 	private void synchronizeBufferWithPlayback() {
+		int bufferPos = calcBufferPosition();
+		if (bufferPos <= playingBuffer.limit()) {
 			playingBuffer.position(calcBufferPosition());
 			windowsRead = (int) ((mc.getCurrentPosition() * sampleRate) / windowSize);
 		}
+	}
 
 	private void setMusic() {
 		Gdx.app.debug("PCMObtainer", "music set.");
@@ -159,8 +162,6 @@ public class PCMObtainer implements Observer, PCMSystem {
 		private volatile boolean run = true;
 		private long timeOfLastRead;
 		private long waitTime;
-		private int syncC, normC;
-		private float syncPercentage;
 		@Override
 		public void run() {
 			while (run) {
@@ -184,13 +185,8 @@ public class PCMObtainer implements Observer, PCMSystem {
 					}
 					if (windowsRead != currentPlaybackWindow) {
 						synchronizeBufferWithPlayback();
-						syncC++;
-					} else {
-						normC++;
 					}
-					syncPercentage = (syncC*100)/(float)(normC+syncC);
-					System.out.printf("%.2f", syncPercentage);
-					System.out.print("%\n");
+					
 					//wait for a bit before reading again depending on the speed at which the system does playback.
 					waitTime = Math.max(0, millisPerWindow - TimeUtils.timeSinceMillis(timeOfLastRead));
 					try {
@@ -213,6 +209,7 @@ public class PCMObtainer implements Observer, PCMSystem {
 		public void start() {
 			if (thread == null) {
 				thread = new Thread(this, name);
+				thread.setDaemon(true);
 				thread.start();
 			} else {
 				synchronized (this) {

desktop/src/zero1hd/rhythmbullet/desktop/graphics/ui/pages/Page.java

@@ -35,10 +35,11 @@ public class Page extends Group implements Disposable {
 	
 	@Override
 	public void setStage(Stage stage) {
-		if (stage == null && !hasParent()) {
+		if (stage == null) {
+			if (!hasParent()) {
 				dispose();
 			}
-		if (!(stage.getViewport() instanceof ScreenViewport)) {
+		} else if (!(stage.getViewport() instanceof ScreenViewport)) {
 			throw new IllegalArgumentException("Pages are explicitly for GUIs, and thus should have a 1:1 ratio between pixel and texture size for maximum clarity. This means that the stage should be using a ScreenViewport.");
 		}
 		super.setStage(stage);

desktop/src/zero1hd/rhythmbullet/desktop/screens/main/MainScreen.java

@@ -149,6 +149,7 @@ public class MainScreen extends ScreenAdapter implements ResizeReadyScreen {
 			}
 		});	
 		
+		
 		stage.addListener(new ClickListener() {
 			@Override
 			public void clicked(InputEvent event, float x, float y) {