For some reason I experienced another odd memory leak and I'm not sure what causing it, when I try to access one of my view controllers.



The thing was... I mistakenly selected "Simulator 3.0" which the bug exists.



Apple already fixed this issue with 3.1.
Under "Known Issues and Fixes/Core Data"
"The memory leak of an NSConcreteMutableData instance when processing object changes has been fixed."