RHEL 5.8 x86_64 with OpenAFS 1.6.0 built just now: -bash-3.2# /sbin/insmod /usr/vice/etc/modload/libafs-2.6.18-308.el5.mp.ko insmod: error inserting '/usr/vice/etc/modload/libafs-2.6.18-308.el5.mp.ko': -1 Unknown symbol in module -bash-3.2# uname -a Linux rcf-linux-beta.our.org 2.6.18-308.el5 #1 SMP Fri Jan 27 17:17:51 EST 2012 x86_64 x86_64 x86_64 GNU/Linux