Seems something's wonky with locale support in glibc-2.1.92-14.2.4, which is included as part of the 'preview' of things to come on the second RedHat 7.0 cd. After upgrading to 2.4.0-test9pre7 and then installing glibc-2.1.92-14.2.4, I get the following when I try to run up2date: [root@merlin /root]# up2date Gdk-WARNING **: locale not supported by C library Gdk-WARNING **: locale not supported by C library Gdk-WARNING **: locale not supported by C library [root@merlin /root]# Also: [root@merlin /root]# xterm Warning: locale not supported by C library, locale unchanged [root@merlin /root]# The same behaviour shows up in both the i386 and i686 versions of the package. System is an ABIT BP6 with Celeron 366s, 256mb RAM, 2.4.0-test9pre7 kernel. .config available if neccesary. This problem is *not* present with the 'stock' glibc-2.1.92-14 that is shipped with RedHat 7.0. It's just the preview version that has this problem.
Looks like this was fixed at some point in the errata updates or something.