One final thing: My inner investor isn't really that worried or nervous about this, which surprises me a little. I'm taking that as a good sign, but it's a wholly personal thing.
UPDATE lunchtime: BTO announces this and the feeling above fits into the contents that 1) not as serious as other cases 2) the loose cannon effect still can't be ruled out. Bottom line is that before I was reasonably relaxed about holding through, now I'm even more relaxed, but I'm too whussy to add any more (plus I'm already overweight BTO, the eggs-in-one-basket rule says I shouldn't rush and and get more). Or as reader RL succinctly put it in the shortest mail I've received today, "Overblown...blow over".