Missing frameworks after upgrading to Xcode 3.2 - via Stack Overflow
Just a little note, sorry if it's too technical.
If you miss some SDK in your project after updating to later version, this is what you need to do to get them back.
I just had the same issue when upgrading to 3.1.2. One thing you will want to do is open your Xcode Project, right-click on the project and Get Info... Then change the Base SDK for All Configurations to (the minimum of) 2.2.1.
