App built with Xcode 4.2 ios 5.0 crashing when installed on iphone with ios 4.3.5

Question

I have an app that will not build anymore on ios 4.x

Last week it worked fine, and now I can confirm 2 people with older ios\' are unable to launch the app on Test F

Answer 1

The solution,

I changed focus and tried to get the app to run on my old ipod touch 3.1

I found the solution here

Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?

by mmorris

I had to do what he clearly explained and 1 more thing:
Set the compiler in the Project and Target Build Set to LLVM GCC 4.2
That got the app running on my old ipod touch and my the iphones with 4.x.

Not sure how any of those settings could have changed from last week, but I am not going to think about that.