This was the first submission. The second submission, which replaces it, is here. The second submission differs from the first by adding 30 strengthening permutations at the end of every hash and changing the shift and map constants.

The original 16 shift constants were supposed to be of the form i+8j, where all i in 0..7 and j in 0..7 were used twice. They weren't. Plain old bug. The 30 final permutations were needed because Maraca claims that every delta must pass through 30 permutations, but if you could ignore the last use of the last block, deltas in blocks 2,3,7 in a 7-block message only need to pass through 24 permutations.