在设置了基本SDK之后，iPhone模拟器会在NSKeyedUnarchiver中运行

I started a project in xcode (3.2 on snow leopard) with base sdk 3.1.2. Now I changed this setting to 3.0 and it compiles without a warning. There are no problems running the app on the device, but the simulator crashes on launch every time with the following exception:I started a project in xcode (3.2 on snow leopa