--- a/README.gnuplot
+++ b/README.gnuplot
@@ -1,15 +1,17 @@
-Octave works best with recent beta releases of gnuplot 4.0, which are
-available from http://www.gnuplot.info.
-
-Hint: Under X11, please put
+Octave works best with gnuplot 4.2, which is available from
+http://www.gnuplot.info.
 
-  set mouse
+Octave now sends data over the same pipe that is used to send commands
+to gnuplot.  While this avoids the problem of cluttering /tmp with
+data files, it is no longer possible to use the mouse to zoom in on
+plots.  This is a limitation of gnuplot, which is unable to zoom when
+the data it plots is not stored in a file.  Some work has been done to
+fix this problem in newer versions of gnuplot (> 4.2.2).  See for
+example, this thread
 
-into your $HOME/.gnuplot file so that you may manipulate the plot
-window using the mouse (see the gnuplot FAQ for more details).
+  http://www.nabble.com/zooming-of-inline-data-tf4357017.html#a12416496
 
-Note that this is not necessary for the current development version of
-gnuplot 4.1.
+on the gnuplot development list.
 
 
 John W. Eaton
@@ -17,4 +19,4 @@
 University of Wisconsin-Madison
 Department of Chemical Engineering
 
-Mon Oct 10 15:25:03 2005
+Last updated: Wed, 31 Oct 2007 16:28:39 EDT