These are TESTING binaries of the gnuplot 4.6 branch, NOT an official release.
They were built by Bastian Maerkisch. Please report bugs and observations to

  gnuplot-beta@lists.sourceforge.net,

or the SourceForge bug tracker at

  http://sourceforge.net/p/gnuplot/bugs/ .

Other testing binaries may be found at

  http://www.gnuplot.info/development/binaries

The gp465-win-32-mingw-rc1 package was built from current CVS using MinGW/MSYS
and the Makefile in config/mingw/. Additionally, it includes this README,
fontconfig configuration files and library dependencies.
 
Build environment for the 4.6.5 prerelease binary:
  - recent MinGW/MSYS, GCC v4.8.1, (1)
  - lua 5.2 (1)
  - zlib 1.2.8 (1)
  - cairo 1.10.2 (2)
  - expat 2.0.1 (2)
  - fontconfig 2.8.0 (2)
  - freetype 2.4.2 (2)
  - gettext 0.18.1.1 (2)
  - glib 2.28.8 (2)
  - libpng 1.4.3 (2)
  - pango 1.29.4 (2)
  - pkg-config 0.26 (2)
  - libgd 2.1.0 (3)
  - libjpeg-turbo (4)
  - wxWidgets wxMSW 2.8.12 (5)
  - libcerf 1.3 (6)
  - libcaca SVN rev #4872 (7)

  (1) binary, http://www.mingw.org/
  (2) binary, http://www.gtk.org/download/win32.php
  (3) source, http://www.libgd.org
  (4) binary, http://www.libjpeg-turbo.org/
  (5) source, http://www.wxwidgets.org/downloads/
  (6) source, http://apps.jcns.fz-juelich.de/src/libcerf/
  (7) source, http://caca.zoy.org/wiki/libcaca

.