Added a note about removing preferences and .pyc files when you move the Python installation.
diff --git a/Mac/ReadMe b/Mac/ReadMe
index abee69c..cde2b08 100644
--- a/Mac/ReadMe
+++ b/Mac/ReadMe
@@ -63,6 +63,10 @@
 remove your preference file first (but no such action is needed for installing
 beside older MacPythons, and they will live together happily).
 
+Moving your Python installation after installing is generally not a good idea.
+If you have to do this anyway you should remove your preference file, run
+ConfigurePython and remove all .pyc files.
+
 If you don't have enough memory: the sizes choosen are somewhat
 arbitrary. Try lowering the application sizes in the finder "get info"
 window, and seeing whether the resulting python is still usable. Some
@@ -75,15 +79,15 @@
 It is probably a good idea to run the automatic tests. Start
 Python and "import test.autotest". 
 
-Three tests will fail on the mac, all with MemoryErrors: test_sha, test_longexp
-and test_zlib. If you increase the PythonInterpreter memory partition size they
-will pass.
-It will, however, print some messages about optional features
-not supported. Also, if you didn't run compileall before autotesting
-you may run out of memory the first time you run the
-tests. test_socket may also fail if you have no internet
-connection. Please also read the Relnotes file for other minor
-problems with this distribution.
+Three tests will fail on the mac, all with MemoryErrors: test_sha,
+test_longexp and test_zlib. If you increase the PythonInterpreter memory
+partition size they will pass. It will, however, print some messages
+about optional features not supported. You should not worry about these,
+they are modules that are supported by Python on other platforms. Also,
+if you didn't run compileall before autotesting you may run out of
+memory the first time you run the tests. test_socket may also fail if
+you have no internet connection. Please also read the Relnotes file for
+other minor problems with this distribution.
 
 Using Python is most easily done from the IDE, which has a builtin editor,
 debugger and other goodies. The alternative is to use PythonInterpreter,