I have also had a problem with Attempting to create USE_BLOCK_IN_FRAME variable with block that isn't in the frame . Although mine wasn't anything to do with NSFetchedResultsControllers.
When this happened to me, the deployment target had somehow changed to 4.1, but I only had the 4.3 simulator without the additional debugging support for 4.0-4.1.
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.