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:
nspr-4.10.8-1.el5_11.i386.rpm
nspr-devel-4.10.8-1.el5_11.i386.rpm

x86_64:
nspr-4.10.8-1.el5_11.i386.rpm
nspr-4.10.8-1.el5_11.x86_64.rpm
nspr-devel-4.10.8-1.el5_11.i386.rpm
nspr-devel-4.10.8-1.el5_11.x86_64.rpm