IPhone: NSFetchedResultsController with delegate and data update from a separate thread?

Two separate questions here. First, if you are getting mutating errors that means you are mutating a set or array (or relationship) while iterating over that set/array/relationship. Find where you are doing that and stop doing it.

That is the only solution.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.