diff --git a/app/PdeSketch.java b/app/PdeSketch.java
index 746cb94d7..b2d6a09ce 100644
--- a/app/PdeSketch.java
+++ b/app/PdeSketch.java
@@ -424,6 +424,16 @@ public class PdeSketch {
       if (!dataFolder.exists()) dataFolder.mkdirs();
       destFile = new File(dataFolder, filename);
     }
+
+    // make sure they aren't the same file
+    if (sourceFile.equals(destFile)) {
+      PdeBase.showWarning("You can't fool me", 
+                          "This file has already been copied to the\n" +
+                          "location where you're trying to add it.\n" +
+                          "I ain't not doin nuthin'.", null);
+      return;
+    }
+
     try {
       PdeBase.copyFile(sourceFile, destFile);
     } catch (IOException e) {
@@ -1263,14 +1273,6 @@ public class PdeSketch {
   }
 
 
-  /**
-   * Returns the path to the sketch folder. 
-   * Used by PdeEditor.handleSaveAs()
-   */
-  //public String getPath() {
-  //return sketchFolder.getPath();
-  //}
-
   /**
    * Returns path to the main .pde file for this sketch.
    */
diff --git a/todo.txt b/todo.txt
index 83786b62d..409f4d604 100644
--- a/todo.txt
+++ b/todo.txt
@@ -26,6 +26,11 @@ X start working on "save as"
 
 040622 monday
 X finish "save as"
+X adding files to data folder that are already in the data folder
+X   makes the file zero, because of internal error
+X   added something to check to make sure they weren't the same
+X   http://processing.org/discourse/yabb/YaBB.cgi?board=Proce55ing_software_bugs;action=display;num=1076358515
+
 _ after using sketchbook menu as popup, disappears from file menu
 _ re-implement history
 _ write sketchbook.clean()
@@ -44,10 +49,6 @@ _ comments -> embedding in applet text? (ala javadoc)
 _   would this help casey with the examples?
 
 
-_ adding files to data folder that are already in the data folder
-_   makes the file zero, because of internal error
-_   http://processing.org/discourse/yabb/YaBB.cgi?board=Proce55ing_software_bugs;action=display;num=1076358515
-
 
 discuss with casey
 _ is the sketch folder something that is never seen by the user?