After many attempts I have found a fix that works for my situation (Win
8 dual boot with 14-04 upgraded from 13-10 after running boot repair)

Status before fix
on power-up "symbol 'grub_term_highlight_color' not found"

boot from 14-04 USB

sudo parted -l
        Model: ATA TOSHIBA MQ01ABD1 (scsi)
        Disk /dev/sda: 1000GB
        Sector size (logical/physical): 512B/4096B
        Partition Table: gpt

        Number  Start   End     Size    File system     Name                  
Flags
         1      1049kB  1075MB  1074MB  ntfs            Basic data partition  
hidden, diag
         2      1075MB  1347MB  273MB   fat32           Basic data partition  
boot
         3      1347MB  1482MB  134MB   ntfs            Basic data partition  
msftres
         4      1482MB  496GB   494GB   ntfs            Basic data partition
         6      496GB   498GB   2048MB  linux-swap(v1)
         7      498GB   968GB   470GB   ext4
         8      968GB   988GB   20.0GB  ext4
         5      989GB   1000GB  11.7GB  ntfs            Basic data partition  
hidden, diag

sudo efibootmgr -v
        BootCurrent: 0004
        Timeout: 0 seconds
        BootOrder: 0004,0000,0003,2003,2001,2002
        Boot0000* ubuntu        
HD(2,200800,82000,ccc07869-f302-11e2-9c39-b3f1c77c46b3)File(\EFI\ubuntu\shimx64.efi)
        Boot0001* EFI Network 0 for IPv6 (08-9E-01-DF-22-D9)    
ACPI(a0341d0,0)PCI(1c,3)PCI(0,0)MAC(089e01df22d9,0)030d3c000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000RC
        Boot0002* EFI Network 0 for IPv4 (08-9E-01-DF-22-D9)    
ACPI(a0341d0,0)PCI(1c,3)PCI(0,0)MAC(089e01df22d9,0)IPv4(0.0.0.0:0<->0.0.0.0:0,0,
 0RC
        Boot0003* Ubuntu        
HD(2,200800,82000,ccc07869-f302-11e2-9c39-b3f1c77c46b3)File(\EFI\ubuntu\grubx64.efi)RC
        Boot0004* Windows Boot Manager  
HD(2,200800,82000,ccc07869-f302-11e2-9c39-b3f1c77c46b3)File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}....................
        Boot2001* EFI USB Device        RC
        Boot2002* EFI DVD/CDROM RC
        Boot2003* EFI Network   RC

Fix Summary omitting all unsuccessful activities/reboots etc

sudo mkdir /mnt/temp /mnt/temp/boot  
sudo mount /dev/sda8 /mnt/temp
sudo mount /dev/sda2 /mnt/temp/boot
for i in /dev /dev/pts /proc /sys; do sudo mount -B $i /mnt/temp$i;  
done
sudo cp /etc/resolv.conf /mnt/temp/etc/resolv.conf
sudo chroot /mnt/temp

mkdir /boot/EFI/old
cd /boot/EFI
mv Boot /boot/EFI/old/.

vi /etc/grub.d/40_custom

G (go to end of file) 
a (append)

menuentry "Windows 8 on /dev/sda2" {
    insmod part_gpt
    insmod fat
    insmod chain
    set root='(hd0,gpt2)'
    chainloader /EFI/Microsoft/Boot/bkpbootmgfw.efi
}

ESC (quit text entry)
:wq! (save and exit)

dpkg-reconfigure grub-efi-amd64
        Installing for x86_64-efi platform.
        Installation finished. No error reported.
        Generating grub configuration file ...
        Found linux image: /boot/vmlinuz-3.13.0-24-lowlatency
        Found initrd image: /boot/initrd.img-3.13.0-24-lowlatency
        Found linux image: /boot/vmlinuz-3.13.0-24-lowlatency
        Found initrd image: /boot/initrd.img-3.13.0-24-lowlatency
        Found linux image: /boot/vmlinuz-3.13.0-24-generic
        Found initrd image: /boot/initrd.img-3.13.0-24-generic
        Found Windows Boot Manager on /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
        Adding boot menu entry for EFI firmware configuration
        done

exit
for i in /dev/pts /dev /proc /sys /boot; do sudo umount /mnt/temp$i; 
done

Notes:
There appear to be 2 problems:
1 - grub error on power-up before Boot Menu can be displayed
        Cause - extra Boot directory in /boot/EFI probably created in previous 
run of Boot Repair
        Countermeasure - move /boot/EFI/Boot 
2 - grub error on selection of Windows from Boot Menu
        Cause - boot/EFI/Microsoft/Boot/bootmgfw.efi renamed to bkpbootmgfw.efi 
and replaced during previous run of Boot Repair. Replacment not functional in 
14-04.
        Countermeasure - create new menu entry similar to existing Windows 
option but calling bkpbootmgfw.efi instead of bootmgfw.efi
                         run dpkg-reconfigure grub-efi-amd64 to update grub.cfg

The above actions (or similar) are all detailed in this thread, but not all 
together.  
This gives me a working system where I can run 14-04 or Windows by selecting 
the 'Windows 8' option.
However, I imagine that the problem(s) could return on any future install or 
upgrade...?

I agree with #167, but for users with dual boot Win8/14-04 also to advise 
creation of a set of Windows restore disks.
Also, would it be a good idea to draw attention to this on the download page, 
rather than in the release notes?

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https://bugs.launchpad.net/bugs/1289977

Title:
  Ubuntu 14.04 Update breaks grub, resulting in "error: symbol
  'grub_term_highlight_color' not found"

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