App crashing when upgraded xcode

I have this problem of my app crashing (only when press a certain UIButton) after i upgraded my xcode to the latest 3.2.5 and iPhone simulator 4.2. It works fine in my friend laptop, who hasn't upgraded yet. I googled for answers, but most of them faces problem only crashing in simulator but not device. Mine crashes for both.

Anyone has any idea about 开发者_如何学JAVAthis issue? I cant seem to find any solution.

UPDATE: Got this error only when run application on device.

warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/usr/lib/info/dns.so (file not found). Program received signal: “EXC_BAD_ACCESS”. warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found). (gdb)

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Delete the app from your device, run a "Clean" in Xcode, and then try again. Sometimes things just get messed up.

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Double-check your project settings; more specifically, those that set directories. Also, make sure the appropriate files are in their respective build phases.

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Solved this! Due to some duplicate codings. Thanks everyone for your help!