2.5.27 RAID1 not shutting down at halt/reboot???

Linux 2.5.27 running over a redhat 7.3 distro...

I've got the raid1/md stuff working correctly, but the system doesn't shut
down the raid arrays at reboot/halt/poweroff...

A quick look at the md_notify_reboot code in drivers/md.c line 3174 reveals:

    printk(KERN_INFO "md: stopping all md devices.\n");
    return NOTIFY_DONE;

!!! followed by the md array shutdown code, which is obviously never called.

Is there a reason for this? Should _something_else_ be shutting down /read-only switching the raid arrays at system halt?