addAnnotations in MapKit causing iPhone app to crash

So开发者_开发百科 my app uses MapKit, and many of the people who have downloaded my app are complaining that it crashes right after the map loads. I can assume that its crashing once the annotations are being displayed on the map. I have no history of crashes in my itunes connect crash logs (should i??), but they posted in a review that they're using iphone v1, and iOs 3.1.3. I have never been able to replicate this crash myself, and I think it may be because the lower version supported by the simulator is 3.2.

Does anyone know who I can debug in this situation?

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Check multiple annotation at Same Lat log.