--- a/NEWS
+++ b/NEWS
@@ -42,6 +42,13 @@
     + Plot property values are not extensively checked.  Specifying
       invalid property values may produce unpredictible results.
 
+    + Octave no longer creates temporary data files for plotting, but
+      instead 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.
 
  ** The way Octave handles search paths has changed.  Instead of
     setting the built-in variable LOADPATH, you must use addpath,