Set iOS Deployment Target of built project

Reference: http://developer.appcelerator.com/question/110801/how-to-set-iphone-minimum-os-requirements-not-to-be-31

How to set iPhone Minimum OS Requirements not to be 3.1?

I released my iPhone app only to find that the Minimum OS Requirements is 3.1. The application doesn't actually run on 3.1 as it was made to run only on 4.2. I want to fix this in an update to my application but regardless of what I try nothing seems to change the 3.1 version requirement (built with Ti 1.5.1).

I've read over all the Q&A I could locate and even this bug report.

1st Attempt

I have changed the /Library/Application Support/Titanium/mobilesdk//iphone/Info.plist template so that the build's Info.plist would have the MinimumOSVersion property in it but that didn't help.

2nd Attempt

I have changed the /Library/Application Support/Titanium/mobilesdk//iphone/iphone/Titanium.xcodeproj template so that the xcode project file would be generated with the IPHONE_DEPLOYMENT_TARGET set to 4.2 instead of 3.1 but that didn't change it either. This does work; if you open the built code in xcode you'll see the IOS Deployment Target set to 4.2.

Final Thoughts

So unless the issue is that once you've released an app as Minimum OS Requirements 3.1 all other versions are also 3.1 I'm stumped.