> Hmmm.... As much as I dislike rebuilding nodes, I certainly wouldn't
> trust one after messing with it manually like that.  I'd be rebuilding it.

I know what you mean.  Still, if I can explain the problem, I might be able to 
reason that the effects were such that all updates were applied in order, 
even if they were done twice in succession.  In that case I wouldn't have to 
start the week-long backup and vacuum-free rebuild....