--- gforth/doc/vmgen.texi	2002/08/28 21:46:59	1.18
+++ gforth/doc/vmgen.texi	2002/09/22 09:00:05	1.20
@@ -1163,7 +1163,7 @@ You have used an instruction-stream pref
 side).
 
 @cindex @code{prefix for this combination must be defined earlier} error
-@item the prefix for this combination must be defined earlier
+@item the prefix for this superinstruction must be defined earlier
 You have defined a superinstruction (e.g. @code{abc = a b c}) without
 defining its direct prefix (e.g., @code{ab = a b}),
 @xref{Superinstructions}.
@@ -1809,7 +1809,13 @@ please let us know.
 @chapter Changes
 @cindex Changes from old versions
 
-Use-visible changes between 0.5.9-20010501 and 0.5.9-20020822:
+User-visible changes between 0.5.9-20020822 and 0.5.9-20020901:
+
+The store optimization is now disabled by default, but can be enabled by
+the user (@pxref{Store Optimization}).  Documentation for this
+optimization is also new.
+
+User-visible changes between 0.5.9-20010501 and 0.5.9-20020822:
 
 There is now a manual (in info, HTML, Postscript, or plain text format).