Oh well, I'm trying an update with exactarch=0 to see if that works. Failing that I'll download the updated 4.2 ISO's and install from that.
Be careful with that. It may affect more than just glibc. If you're going to do update with exactarch=0, do 'yum install glibc' or something similar to avoid pulling in ALL other affected rpms.
-- Jim Perrin System Architect - UIT Ft Gordon & US Army Signal Center