diff --git a/tren.rst b/tren.rst
index c4127aa..d093a1f 100644
--- a/tren.rst
+++ b/tren.rst
@@ -3027,6 +3027,16 @@
   test mode and make sure your proposed renaming isn't going to
   require deeply recursive backups.
 
+- The argument ``-r=`` is always ignored because it means "change
+  the empty string into the empty string".  It might be tempting
+  to try this to get rid of characters via a target, but it won't
+  work::
+
+    tren.py -T -1 -r= foo-   # Nope - have to do it explicitly
+
+    tren.py -T -1 -r-= foo-  # Yup
+
+
 - Save the output from your **tren** runs in logs.  That way, if you
   have to unwind a renaming gone bad, you'll have a record of what was
   done.
@@ -3039,8 +3049,9 @@
 BUGS, MISFEATURES, OTHER
 ------------------------
 
-You must be running Python 2.6.x or later.  **tren** makes use of
-features not supported in releases prior to this.  **tren** has not
+You must be running Python 2.4.x or later.  **tren** makes use of
+features not supported in releases prior to this. (It *may* also work
+with Python 2.3.x but is untested on that release.)  **tren** has not
 been tested with Python 3.x and is presumed not to work with it
 until/unless otherwise demonstrated.
 
@@ -3076,7 +3087,7 @@
 COPYRIGHT AND LICENSING
 -----------------------
 
-**tren** is Copyright (c) 2010 TundraWare Inc.
+**tren** is Copyright (c) 2010-2011 TundraWare Inc.
 
 For terms of use, see the ``tren-license.txt`` file in the
 program distribution.  If you install **tren** on a FreeBSD
@@ -3099,7 +3110,7 @@
 
 ::
 
-  $Id: tren.rst,v 1.200 2010/11/17 19:52:56 tundra Exp $
+  $Id: tren.rst,v 1.201 2011/08/01 18:06:26 tundra Exp $
 
 You can find the latest version of this program at: