The following FASTBUGS have been uploaded to

http://ftp.scientificlinux.org/linux/scientific/6x/i386/updates/fastbugs/
http://ftp.scientificlinux.org/linux/scientific/6x/x86_64/updates/fastbugs/

i386:

libvirt-0.8.7-18.el6_1.4.i386.rpm
libvirt-client-0.8.7-18.el6_1.4.i386.rpm
libvirt-devel-0.8.7-18.el6_1.4.i386.rpm
libvirt-python-0.8.7-18.el6_1.4.i386.rpm


x86_64:

libvirt-0.8.7-18.el6_1.4.x86_64.rpm
libvirt-client-0.8.7-18.el6_1.4.x86_64.rpm
libvirt-devel-0.8.7-18.el6_1.4.x86_64.rpm
libvirt-python-0.8.7-18.el6_1.4.x86_64.rpm