Changes in version 2.9:

    o   Fixed a bug in the C code of Graphviz which manifests itself when
	 the following options are given to GCC "-Wformat -Wformat-security
	 -Werror=format-security -D_FORTIFY_SOURCE=2", this is the case for
	 Ubuntu 12.04.  Reported by Vladimir Zhurov <vzhurov2@uwo.ca>,
	 Venkat Seshan <veseshan@gmail.com> and Chong Tang <tangc3@unr.edu>.

Changes in version 2.7:

    o   Fixed include statements in Graphviz code.

Changes in version 2.5:

    o   Expose mai argument in plot,Ragraph-method.

    o   Changed the LICENSE to EPL.

    o   Fixed some wrong text in the DESCRIPTION file.

    o   Fixed pieGylph to adress the issue of warning messages about
	 rep(NULL) (reported by Cristobal Fresno Rodríguez
	 <Cristobalfresno@gmail.com>).

    o   Updated Imports, Depends, NAMESPACE as per R CMD check requirements.

    o   Fixing issue with the lt~obsolete.m4 file(s) in Graphviz; R CMD
	 check was issueing a warning.

    o   Moved vignettes from inst/doc to vignettes directory.

Changes in version 2.4:

    o   Backported the pieGylph fix to the release branch.

Changes in version 2.3:

    o   Fixing bug in Graphviz on OpenBSD regarding sincos (Thanks to Rainer
	 Hurling).

    o   Now using path.expand to fix tilde-expansion.

    o   We no longer include <R_ext/RConverters.h>; which seemingly was not
	 needed (Thanks to Brian D. Ripley).

    o   Fix handling of fontsize attrib for nodes and edges (seems it has
	 been broken at least since 2006).

Changes in version 2.2:

    o   Plotting now longer accepts border.lwd or border.col.  Instead of
	 border.col use color.  Instead of border.lwd, you need to use the
	 renderGraph/layoutGraph interface.  This fixes a long standing bug
	 where Rgraphviz writes illegal dot files.  unitTest has been added.

    o   bugfix to renderNodes (used in renderGraph) for nodes with shape =
	 "triangle".  It now works.

    o   bugfix to renderNodes (used in renderGraph) for using node-specific
	 lwd and shapes either "triangle", "ellipse" or "circle".  It now
	 works.

Changes in version 2.1:

    o   Rgraphviz now requires Graphviz >= 2.16.

    o   Added graphvizCapabilities() that reports the capabilities of
	 Graphviz.  This requires Graphviz >= 2.28 and returns NULL if the
	 Rgraphviz installation does not support it.

    o   Rgraphviz now comes bundled with Graphviz 2.28, greatly simplifying
	 installation.

    o   Numerous bugfixes for bugs introduced in the 2.x.x versions.