OK, after a bit more searching I find that this problem was discovered back in May and apparently never acted on. The 2.6.12 kernels require an updated udev package. See https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=158570 and http://www.ussg.iu.edu/hypermail/linux/kernel/0505.2/1368.html I've opened a new bugzilla report against the kernel for the missing dependency. See https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=163438
