menu.lst problems

[Peter Hillier-Brook]

Hello all,

is there anyone who can help to stop my head hurting? After a trivial 
edit of menu.lst to fix a couple of options, I can no longer boot the 
default kernel (Error 15: File not found), although I can boot from the 
recovery version and, at the appropriate time, select to continue 
normally. I can see no differences and therefore I suspect that I'm 
missing the obvious, whatever that might be.

The relevant fragment of menu.lst follows.

title		Ubuntu 8.10, kernel 2.6.27-11-generic
uuid		a42730ca-039c-485d-a153-c367d8ef4f51
kernel	 
/vmlinuz-2.6.27-11-genericroot=UUID=1d77c373-b6c8-41ba-bb0f-2f2a99d88df8 ro
initrd		/initrd.img-2.6.27-11-generic
quiet

title		Ubuntu 8.10, kernel 2.6.27-11-generic (recovery mode)
uuid		a42730ca-039c-485d-a153-c367d8ef4f51
kernel		/vmlinuz-2.6.27-11-generic 
root=UUID=1d77c373-b6c8-41ba-bb0f-2f2a99d88df8 ro  single
initrd		/initrd.img-2.6.27-11-generic

Whilst on this topic, I also tried to manually use update-grub to detect 
the -11 kernel which should have been automatically added to menu.lst 
(the relevant entries are in kernel-img.conf), but wasn't. It claimed to 
be doing the job, but the result was an unchanged menu.lst.

Ant thoughts gratefully received.

Peter HB