diff --git a/app/src/processing/mode/java/JavaBuild.java b/app/src/processing/mode/java/JavaBuild.java
index a4f680cd4..7ed8c0b04 100644
--- a/app/src/processing/mode/java/JavaBuild.java
+++ b/app/src/processing/mode/java/JavaBuild.java
@@ -1448,7 +1448,7 @@ public class JavaBuild {
     String preprocFilename = sketch.getName() + ".java";
     File preprocFile = new File(srcFolder, preprocFilename);
     if (preprocFile.exists()) {
-      preprocFile.renameTo(new File(sourceFolder, preprocFilename));
+      Base.copyFile(preprocFile, new File(sourceFolder, preprocFilename));
     } else {
       System.err.println("Could not copy source file: " + preprocFile.getAbsolutePath());
     }
diff --git a/todo.txt b/todo.txt
index 580d011a4..ec8612065 100644
--- a/todo.txt
+++ b/todo.txt
@@ -23,6 +23,8 @@ X New/Rename Tab commands inhibited when Console/Message Area is hidden
 X   http://code.google.com/p/processing/issues/detail?id=745
 X make sketch.properties usable elsewhere by loading/reloading
 X   http://code.google.com/p/processing/issues/detail?id=722
+X Export to Application reports "Could not copy source file:" 
+X   http://code.google.com/p/processing/issues/detail?id=638
 
 cleanup
 X how is autoformat doing? good now
@@ -43,6 +45,9 @@ o prevent people from setting the font size too small in the editor
 o   how do we figure out what "too small" is?
 X   -> everyone thinks this is funny
 
+_ update the build instructions page
+_   http://code.google.com/p/processing/wiki/BuildInstructions
+
 decisions
 _ kill external editor (for all its quirks) in favor of command line? 
 _ use external editor needs to enable/disable across all windows
@@ -1098,10 +1103,10 @@ _ implement better method of showing curly brace closure
 _   http://dev.processing.org/bugs/show_bug.cgi?id=295
 _ sketches should only write to the console of their editor window
 _   http://dev.processing.org/bugs/show_bug.cgi?id=921
-P5 _ problems with file/print
-P5 _   http://dev.processing.org/bugs/show_bug.cgi?id=1230
-P4 _ comments not always colored correctly
-P4 _   http://dev.processing.org/bugs/show_bug.cgi?id=1194
+_ problems with file/print
+_   http://dev.processing.org/bugs/show_bug.cgi?id=1230
+_ comments shown as code / code shown as comments
+_   http://code.google.com/p/processing/issues/detail?id=164
 _ program sometimes goes gray because it thinks everything is in a comment
 _   http://code.google.com/p/processing/issues/detail?id=564