Added a note that redirecting stdin/stdout does not work due to gusi bug.

Mac/Demo/using.html

@@ -190,6 +190,12 @@ to the script in <CODE>sys.argv</CODE>. Sys.argv[0] is always the name
 of the script being executed, additional values can be passed
 here. Quoting works as expected. <p>
 
+<BLOCKQUOTE>
+<EM>Warning:</EM> redirecting standard input or standard output in the
+command-line dialog does not work. This is due to circumstances beyond my
+control, hence I cannot say when this will be fixed.
+</BLOCKQUOTE>
+
 The default options are also settable on a system-wide basis, see the
 section on <A HREF="#preferences">editing preferences</A>. <p>
 
@@ -374,7 +380,7 @@ The next section to check out is the <a href="index.html">annotated sample progr
 
 <HR>
 <A HREF="http://www.cwi.nl/~jack">Jack Jansen</A>,
-<A HREF="mailto:jack@cwi.nl">jack@cwi.nl</A>, 19-Apr-1996.
+<A HREF="mailto:jack@cwi.nl">jack@cwi.nl</A>, 05-Sep-1996.
 
 </BODY>
 </HTML>