Grub2 fails to boot from menu entry

[Diederik de Haas <didi.debian@cknow.org>]

Hello,

I have grub2 as my bootloader with 2 entries for debian (normal + rescue), some entries for memtest 
and an entry for windows.
If I boot and select one of the debian entries, it fails saying "File not found" (the kernel) and 
initrd also fails since it needs a kernel.
When I go to the grub prompt and enter the following lines it works:
linux	/vmlinuz-2.6.32-5-686-bigmem root=UUID=14104ecd-4242-45b6-a02f-b2326ec34c54
initrd /initrd-2.6.32-5-686-bigmem
boot

But the menu entry in grub.cfg is essentially the same except the path to vmlinuz and initrd start 
with /boot/vmlinuz and /boot/initrd respectively.
My boot partition is /dev/sda1 and my root partition is /dev/sda5.
I've reinstalled grub-pc, grub-common and linux-image-2.6.32-5-686-bigmem and rebooted ... fail.

How come that if I enter the commands at the grub prompt it works, but if I select it from the menu 
it fails?
And more importantly, what to do about it?

Thanks in advance,
  Diederik

PS: Please CC me as I'm not subscribed to this list.

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}

function load_video {
  insmod vbe
  insmod vga
  insmod video_bochs
  insmod video_cirrus
}

insmod part_msdos
insmod ext2
set root='(hd1,msdos5)'
search --no-floppy --fs-uuid --set 14104ecd-4242-45b6-a02f-b2326ec34c54
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd1,msdos1)'
search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
set locale_dir=($root)/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686-bigmem' --class debian --class gnu-linux --class gnu --class os {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	echo	'Loading Linux 2.6.32-5-686-bigmem ...'
	linux	/boot/vmlinuz-2.6.32-5-686-bigmem root=UUID=14104ecd-4242-45b6-a02f-b2326ec34c54 ro  quiet
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initrd.img-2.6.32-5-686-bigmem
}
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686-bigmem (recovery mode)' --class debian --class gnu-linux --class gnu --class os {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	echo	'Loading Linux 2.6.32-5-686-bigmem ...'
	linux	/boot/vmlinuz-2.6.32-5-686-bigmem root=UUID=14104ecd-4242-45b6-a02f-b2326ec34c54 ro single 
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initrd.img-2.6.32-5-686-bigmem
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	linux16	/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	linux16	/memtest86+.bin console=ttyS0,115200n8
}
menuentry "Memory test (memtest86+, experimental multiboot)" {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	multiboot	/memtest86+_multiboot.bin
}
menuentry "Memory test (memtest86+, serial console 115200, experimental multiboot)" {
	insmod part_msdos
	insmod ext2
	set root='(hd1,msdos1)'
	search --no-floppy --fs-uuid --set 41cb92ee-b9c7-4299-8cec-6470dc46bc8c
	multiboot	/memtest86+_multiboot.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sda2)" {
	insmod part_msdos
	insmod ntfs
	set root='(hd1,msdos2)'
	search --no-floppy --fs-uuid --set 128cd8de8cd8bd83
	drivemap -s (hd0) ${root}
	chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###