Hi, RHEL5 recently released two updates for pcre in quick succession: https://rhn.redhat.com/errata/RHSA-2007-1052.html # nov 9 https://rhn.redhat.com/errata/RHSA-2007-0967pcre-devel-6.6-2.el.html # nov 5 These were released as SL5 updates: http://listserv.fnal.gov/scripts/wa.exe?A2=ind0711&L=scientific-linux-errata&T=0&P=313 # nov 6 http://listserv.fnal.gov/scripts/wa.exe?A2=ind0711&L=scientific-linux-errata&T=0&P=2375 # nov 13 It looks as if the same version numbers were used for the SL rpms in both cases (pcre-6.6-2.el5.1.i386.rpm etc), meaning that someone who has applied the first update won't get the second installed by an update. Compared to the RHEL5 versions: pcre-6.6-2.el5_1.1.i386.rpm pcre-devel-6.6-2.el5_0.1.i386.rpm the "_0", "_1" part of the name has been lost. Thanks.