diff --git a/core/src/processing/core/PApplet.java b/core/src/processing/core/PApplet.java
index 4c0153318..f32fdbcfc 100644
--- a/core/src/processing/core/PApplet.java
+++ b/core/src/processing/core/PApplet.java
@@ -979,7 +979,7 @@ public class PApplet implements PConstants {
           stderr.append(line);
         }
       } catch (IOException e) {
-        e.printStackTrace();
+        printStackTrace(e);
       }
 
       int resultCode = -1;
@@ -1412,7 +1412,7 @@ public class PApplet implements PConstants {
             throw (RuntimeException) t;
           } else {
             // trap and print as usual
-            t.printStackTrace();
+            printStackTrace(t);
           }
         }
       }
@@ -2240,11 +2240,14 @@ public class PApplet implements PConstants {
           "specified with -Djava.library.path=/path/to/jogl");
 
       } else {
-        ite.getTargetException().printStackTrace();
+        printStackTrace(ite.getTargetException());
         Throwable target = ite.getTargetException();
+        /*
+        // removing for 3.2, we'll see
         if (platform == MACOSX) {
           target.printStackTrace(System.out);  // OS X bug (still true?)
         }
+        */
         throw new RuntimeException(target.getMessage());
       }
 
@@ -2271,16 +2274,18 @@ public class PApplet implements PConstants {
           throw new RuntimeException(e);
 
         } else {
-          e.printStackTrace();
+          printStackTrace(e);
           String msg = renderer + " needs to be updated " +
             "for the current release of Processing.";
           throw new RuntimeException(msg);
         }
       } else {
+        /*
         if (platform == MACOSX) {
           e.printStackTrace(System.out);  // OS X bug (still true?)
         }
-        e.printStackTrace();
+        */
+        printStackTrace(e);
         throw new RuntimeException(e.getMessage());
       }
     }
@@ -3368,9 +3373,9 @@ public class PApplet implements PConstants {
         launch(url);
       }
     } catch (IOException e) {
-      e.printStackTrace();
+      printStackTrace(e);
     } catch (URISyntaxException e) {
-      e.printStackTrace();
+      printStackTrace(e);
     }
   }
 
@@ -3472,8 +3477,7 @@ public class PApplet implements PConstants {
     try {
       return Runtime.getRuntime().exec(args);
     } catch (Exception e) {
-      e.printStackTrace();
-      throw new RuntimeException("Could not open " + join(args, ' '));
+      throw new RuntimeException("Could not open " + join(args, ' '), e);
     }
   }
 
@@ -3488,6 +3492,15 @@ public class PApplet implements PConstants {
   //////////////////////////////////////////////////////////////
 
 
+  /**
+   * Better way of handling e.printStackTrace() calls so that they can be
+   * handled by subclasses as necessary.
+   */
+  protected void printStackTrace(Throwable t) {
+    t.printStackTrace();
+  }
+
+
   /**
    * Function for an applet/application to kill itself and
    * display an error. Mostly this is here to be improved later.
diff --git a/todo.txt b/todo.txt
index 10dcb405d..98d1bb5c8 100755
--- a/todo.txt
+++ b/todo.txt
@@ -18,6 +18,10 @@ X rewrite Util.listFiles() because it wasn't working properly
 X add 2016 to about-1x and about-2x
 o saying "no" to save changes is the same as "cancel" on windows?
 X   can't reproduce
+X add printStackTrace() method that can be overridden
+X   https://github.com/processing/processing/issues/222
+_ update launch4j to 3.9
+_   https://sourceforge.net/projects/launch4j/files/launch4j-3/3.9/
 
 mode work
 X add template support for Modes
@@ -38,9 +42,20 @@ _   write short docs
 _   https://github.com/processing/processing/issues/4306
 _   https://github.com/processing/processing/issues/4352
 
+earlier
+X display "1" is not correct in 2.1.2
+X   https://github.com/processing/processing/issues/2502
+
+
+_ editor windows always open on display 1
+_   https://github.com/processing/processing/issues/1566
+
 _ allow modes to specify their own base file name
 _   need to move "is this a sketch?" handling into Mode
 
+_ blank window on startup where the "welcome" screen should be
+_   https://github.com/processing/processing/issues/3933
+
 _ modify line number color when no lines extend that far?
 _   https://github.com/processing/processing/pull/4560
 _ text gutter doesn't seem to be hidpi 
@@ -87,10 +102,10 @@ _   https://github.com/processing/processing/issues/3965
 medium
 _ detect changes in case with libraries
 _   https://github.com/processing/processing/issues/4507
-
-lower
 _ make when opening new editor window, open on the same display as current
 _   https://github.com/processing/processing/issues/4526
+_ hidpi scaling via font changes?
+_   http://stackoverflow.com/a/34152675
 _ hi-dpi support on Linux
 _   https://github.com/processing/processing/issues/4183
 _ PDE and sketches are 2x smaller on high-res Windows machines
@@ -288,8 +303,6 @@ _   when run from Eclipse, the single instance thing punts
 _ 'recent' menu needs to recognize the p5 app folder
 _   also should recognize the user's home dir
 _ possibility of libraries folder inside a particular sketch?
-_ display "1" is not correct in 2.1.2
-_   https://github.com/processing/processing/issues/2502
 _ add font fixes to the rest of the API
 _   https://github.com/processing/processing/commit/eaff673d173b2d27f276cf5c59e3abf6c0fab86b
 _   g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,