Pete must be traveling or something as he sent me a PM about this thread and gave me a head's up on an earlier discussion which he thought may be of interest, especially this post:
leaf damage You might want to refer to page 20 of the document linked in that post.
Pete said he has had the problem and it went away when he added lime. I think lime is mentioned in the Hawaii report as they appear to be trying to also raise pH to 5.5-6.5 (see page 14), well below where my soils are at. Calcium nitrate is another option mentioned and gypsum is probably what I would use.