While shutting down the system the kernel ( 2.4.0-0.99.23 i686) crashed when an NFS share (coming from an RHL 7.0 box) should been umounted during shutdown. Reproducible: Couldn't Reproduce kernel spitted out Kernel BUG /usr/src/bs/BUILD/kernel-2.4.0/linux/include/nfs-fs.h:167 invalid operand 0000 and halted. box is running Rawhide 20010206. Contact me if you want to look at it.
We (Red Hat) should really try to resolve this before next release.
SMP or uniprocessor kernel? Which network card? What model computer?
Re-open if you have more information