Update:
I have been rebuilding this PC .... put in extra HDDs & optical drives etc .... so I installed the .bfs kernel, uninstalled the .a64 and had a lot of shutting down and restarting etc etc.
On this boot I have installed the .a64 again ...... and this time, no error messages.
I have no idea what may be at play here, but the error has disappeared.
For some reason, another seems to have appeared ..... I don't know for certain yet.
To explain this one :
I am booting the HDD that is connected to the SAT 3 port.
That drive is first in the boot list in BIOS ..... or it was when I booted into this session.
On installing the .a64 kernel, the menu.lst gets edited ..... an extra stanza is added.
The partition designations do not appear to be correct ..... but I won't know until I reboot .... so here is the present menu.lst after installing the .a64 kernel
timeout 10
color black/cyan yellow/cyan
gfxmenu (hd0,5)/boot/gfxmenu
default 0
title linux
kernel (hd2,5)/boot/vmlinuz BOOT_IMAGE=linux root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc quiet acpi=on resume=UUID=4bfd54de-974f-473e-87af-050e9e99a7bb splash=silent vga=791
initrd (hd2,5)/boot/initrd.img
title linuxnonfb
kernel (hd0,5)/boot/vmlinuz BOOT_IMAGE=linuxnonfb root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc acpi=on resume=UUID=4bfd54de-974f-473e-87af-050e9e99a7bb
initrd (hd0,5)/boot/initrd.img
title failsafe
kernel (hd0,5)/boot/vmlinuz BOOT_IMAGE=failsafe root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc failsafe acpi=on
initrd (hd0,5)/boot/initrd.img
title memtest-4.20
kernel (hd0,5)/boot/memtest-4.20 BOOT_IMAGE=memtest-4.20
title 2.6.38.8-pclos3.bfs
kernel (hd0,5)/boot/vmlinuz-2.6.38.8-pclos3.bfs BOOT_IMAGE=2.6.38.8-pclos3.bfs root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc quiet acpi=on resume=UUID=4bfd54de-974f-473e-87af-050e9e99a7bb splash=silent vga=791
initrd (hd0,5)/boot/initrd-2.6.38.8-pclos3.bfs.img
title linux
kernel (hd0,5)/boot/vmlinuz BOOT_IMAGE=linux root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc quiet acpi=on resume=UUID=4bfd54de-974f-473e-87af-050e9e99a7bb splash=silent vga=791
initrd (hd0,5)/boot/initrd.img
title 2.6.38.8-pclos3.a64
kernel (hd2,5)/boot/vmlinuz-2.6.38.8-pclos3.a64 BOOT_IMAGE=2.6.38.8-pclos3.a64 root=UUID=9dc6a34a-8a6f-4cd6-9ba0-46a24b2907fc quiet acpi=on resume=UUID=4bfd54de-974f-473e-87af-050e9e99a7bb splash=silent vga=791
initrd (hd2,5)/boot/initrd-2.6.38.8-pclos3.a64.img
I will add to this after a reboot ..... maybe some other install on one of the HDDs is the cause ....