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:
dovecot-1.0.7-9.el5_11.4.i386.rpm
ksh-20100621-22.el5_11.i386.rpm

x86_64:
dovecot-1.0.7-9.el5_11.4.x86_64.rpm
ksh-20100621-22.el5_11.x86_64.rpm