I've seen this several times now and still don't
know what "bump" means.
I don't have a saved game for you. But this is
exactly what happened to me. Most people don't
seem to run into this problem and for the few
that did (after searching back 100 pages in the
hints archive) they never mentioned a resolution
to the problem. If you can't get a save from
someone past this point here is what happened to
me: Don't go back to the previous save (before
the two puzzles) because you will simply run into
the same problem. Instead you must keep killing
the pig, getting the ring, dipping the pouch in
the blood and going back to the witch. At some
point (I'd say three times killing the pig, but
not sure) the witch will tell you still haven't
gotten the blood, BUT, you won't be able to leave
the cave!!! (this is the game's way of telling
you that you are too incompetent to solve the
puzzle so it is letting you move on) Now, turn
to the witch and exhaust all conversation topics
and you can continue the game from there (without
having to kill the pig again).
Good luck!