Tcl/Tk 8.4.20 Release Announcement
June 1, 2013

The Tcl Core Team is pleased to announce the 8.4.20 releases of the Tcl
dynamic language and the Tk toolkit.  This is the twentieth and *FINAL*
patch release of Tcl/Tk 8.4.  With this release, support for Tcl/Tk 8.4
comes to an end.  The current release sequence for Tcl and Tk is 8.6.*.
All Tcl/Tk users are encouraged to migrate to that release sequence for
future work.

A note on Mac OS X systems:  Tk 8.4.20 continues to be implemented on
the Carbon system, as were earlier 8.4.* releases.  This means Tk 8.4.20
is not suitable for any current Mac OS X system.  It's a final patch
release of obsolete software that is useful only on equally obsolete
Mac OS X systems.  Those who need Tk suitable for current Mac OS X systems
are already using at least Tk 8.5.

More details can be found below.  We would like to express our gratitude
to all those who submit bug reports and patches.  This information is
invaluable in enabling us to identify and eliminate problems in the core.

Where to get the new releases:
------------------------------

Tcl/Tk 8.4.20 sources are freely available as open source from the
Tcl Developer Xchange web site at:

        http://www.tcl.tk/software/tcltk/8.4.html

This web page also contains additional information about the releases,
including new features and notes about installing and compiling the
releases.  Sources are always available from the Tcl SourceForge
project's file distribution area:

	http://sourceforge.net/projects/tcl/files/

Binaries for most major platforms will be available from:

        http://www.activestate.com/Tcl

For additional information:
---------------------------

Please visit the Tcl Developer Xchange web site:

        http://www.tcl.tk/

This site contains a variety of information about Tcl/Tk in general, the
core Tcl and Tk distributions, Tcl development tools, and much more.

Summary of Changes since Tcl/Tk 8.4.19:
--------------------------------------

It has been five years since the releases of Tcl and Tk 8.4.19.  The
following list of changes is limited to only the most remarkable changes.
The changes file is more complete, but also more limited than usual.

   * Restored Tk compat with post xproto-7.0.13 X11 headers from X.org.

   * New color names: aqua crimson fuchsia indigo lime olive silver teal

   * Update to Unicode 6.2 support

   * [source] of utf-8 files recognizes the Byte Order Mark.

   * [lappend] does not fire read traces.

   * Fewer lies told by [file (read|writ|execut)able] commands.

   * New package releases: dde 1.3.3, http 2.5.7, msgcat 1.3.5,
	registry 1.2.2, tcltest 2.2.11, and platform 1.0.12.

   * Much reduced thread locking on tcl_precision.

   * Long nonfunctional sources for Mac 9 systems removed.

--
Tcl Core Team and Maintainers
Don Porter, Tcl Core Release Manager