According to the salvage crew, the vehicles are fine - they were chained in place, and the cargo didn't shift at all.
"According to Mitsui O.S.K. Lines spokesman Greg Beuerman (beer man), the crew was attempting to remove ballast water, a practice required under international maritime rules to prevent marine organisms picked up at one port from being dumped with the ballast in another part of the world. He said alien organisms can cause significant damage in their new habitat, so the water is released on the high seas. "
From here - http://www.freerepublic.com/focus/f-news/1675699/posts?page=17#17
Any bets that they were running light on ballast in the first place, to save on fuel, and cut it too fine?
Nor compensated for burned fuel?
That tub looks way too top heavy, just like the modified Egyptian ferries they added upper decks to.