The following FASTBUGS have been uploaded to

http://ftp.scientificlinux.org/linux/scientific/5x/i386/updates/fastbugs/
http://ftp.scientificlinux.org/linux/scientific/5x/x86_64/updates/fastbugs/

i386:
xen-3.0.3-142.el5_9.3.i386.rpm
xen-devel-3.0.3-142.el5_9.3.i386.rpm
xen-libs-3.0.3-142.el5_9.3.i386.rpm


x86_64:
xen-3.0.3-142.el5_9.3.x86_64.rpm
xen-devel-3.0.3-142.el5_9.3.i386.rpm
xen-devel-3.0.3-142.el5_9.3.x86_64.rpm
xen-libs-3.0.3-142.el5_9.3.i386.rpm
xen-libs-3.0.3-142.el5_9.3.x86_64.rpm