diff --git a/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java b/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
index a7337fd..690572d 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
@@ -66,7 +66,7 @@
     private final GraphicsDevice graphicsDevice;
 
     /** Listener that listens for escape key. */
-    private EventListener escapeFullScreenModeListener;
+    private transient EventListener escapeFullScreenModeListener;
 
     /**
      * Creates a PFrame with no title, not full screen, and with the default
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/nodes/P3DRect.java b/extras/src/main/java/edu/umd/cs/piccolox/nodes/P3DRect.java
index a2d502c..00150c3 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/nodes/P3DRect.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/nodes/P3DRect.java
@@ -51,17 +51,14 @@
  * @author Ben Bederson
  */
 public class P3DRect extends PNode {
-
-    /**
-     * 
-     */
+   
     private static final long serialVersionUID = 1L;
     private Color topLeftOuterColor;
     private Color topLeftInnerColor;
     private Color bottomRightInnerColor;
     private Color bottomRightOuterColor;
     private final GeneralPath path;
-    private final Stroke stroke;
+    private transient final Stroke stroke;
     private boolean raised;
 
     public P3DRect() {
@@ -161,6 +158,7 @@
         }
     }
 
+    //TODO: Move this into an example (if not already)
     public static void main(final String[] args) {
         new PFrame() {
             /**
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/nodes/PLens.java b/extras/src/main/java/edu/umd/cs/piccolox/nodes/PLens.java
index bccb3b1..ee5df8f 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/nodes/PLens.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/nodes/PLens.java
@@ -63,9 +63,6 @@
  */
 public class PLens extends PNode {
 
-    /**
-     * 
-     */
     private static final long serialVersionUID = 1L;
     public static double LENS_DRAGBAR_HEIGHT = 20;
     public static Paint DEFAULT_DRAGBAR_PAINT = Color.DARK_GRAY;
@@ -73,7 +70,7 @@
 
     private final PPath dragBar;
     private final PCamera camera;
-    private final PDragEventHandler lensDragger;
+    private transient final PDragEventHandler lensDragger;
 
     public PLens() {
         // Drag bar gets resized to fit the available space, so any rectangle
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwing.java b/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwing.java
index bac488a..76e9789 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwing.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwing.java
@@ -247,7 +247,7 @@
     private final List listeningTo = new ArrayList();
 
     /* The parent listener for camera/canvas changes. */
-    private final PropertyChangeListener parentListener = new PropertyChangeListener() {
+    private transient final PropertyChangeListener parentListener = new PropertyChangeListener() {
         /** {@inheritDoc} */
         public void propertyChange(final PropertyChangeEvent evt) {
             final PNode parent = (PNode) evt.getNewValue();
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingMouseEvent.java b/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingMouseEvent.java
index 0144fbe..9e8cc6f 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingMouseEvent.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/pswing/PSwingMouseEvent.java
@@ -80,7 +80,7 @@
      */
     private static final long serialVersionUID = 1L;
     private final int id;
-    private final PInputEvent event;
+    private transient final PInputEvent event;
 
     /**
      * Constructs a new PMouse event from a Java MouseEvent.