Changelog for libguess-devel-1.0-1.el6.i686.rpm :

* Wed Jul 14 2010 Michael Schwendt - 1.0-1- Use fresh 1.0 release tarball, which only adds the makerelease.sh script.- Drop unneeded BuildRoot stuff.
* Tue Jul 13 2010 Michael Schwendt - 1.0-0.1.20100713- Initial RPM packaging.