Warning: Xcode 3.2.4 + iOS SDK 4.1 upgrade may cause headaches if you use LLVM

Looks like somehow Apple has allowed a rather broken Xcode 3.2.4 to be released. If your projects use the LLVM compiler, you may find yourself with lots of errors when you try to compile for the simulator.

The issue has been widely reported and there is a workaround that involves adding


to your Other C Flags (in Project → Edit Project Settings) but you may want to hold off until they fix this issue properly.