Cocoa App Won't Launch on 32-bit Intel?

My Cocoa application, built in Xcode 3.2, runs perfectly on 64-bit machines but does not launch on a 32-bit Intel Mac. The Architecture is set to Standard(32/64-bit), Valid Architectures include "i386, ppc, ppc64, ppc7400, ppc970, x86_64" and Build Active Architecture Only is turned off.

Any suggestions as to why this might not la开发者_StackOverflow中文版unch? There is no error message, the app simply does not open.

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Are you sure there's no error message? Did you check the console log using /Applications/Utilities/Console.app?

Are you the build settings are correct at the target level (ie, target-level settings don't override project-level settings with incorrect values)?