Don't know what else to add.
GRUB now presents 2 x 2 options. Using the older version works fine, using the new one (regular and fail safe) doesn't work. I'd like to be up to date, but also to actually have the newest version working.
Not working = when I choose it, I end up on a black screen, "forever" (more than 1 minute).
Ubuntu installed as wubi, in windows 7.