-Not all of these variables may be implemented in the current release
-of Autoconf and/or Automake; right now, that includes at least
-@code{docdir}, @code{psdir}, @code{pdfdir}, @code{htmldir},
-@code{dvidir}. In these cases, the descriptions here serve as
-specifications for what Autoconf will implement. As a programmer, you
-can either use a development version of Autoconf or avoid using these
-variables until a stable release is made which supports them.
+At times, not all of these variables may be implemented in the current
+release of Autoconf and/or Automake; but as of Autoconf@tie{}2.60, we
+believe all of them are. When any are missing, the descriptions here
+serve as specifications for what Autoconf will implement. As a
+programmer, you can either use a development version of Autoconf or
+avoid using these variables until a stable release is made which
+supports them.