After upgrading my copy of xcode from 3.2.2 to 3.2.3, I am getting over 10000 compilation errors. I have switched all frameworks to the iOS 4.0.x versions, and have set the new sdk to 4.0, with iOS 3.1 as compilation target. What could be causing 10000 errors, and how do I resolve them? (These errors appear everywhere, and even in sdk files and system headers)