Setup XCode SDK 3.0 to work for OS 3.0.1

XCode SDK 3.0 does not yet support OS 3.0.1, so if you plug in an updated iPhone you will encounter an error. There is an Advisory at Apples developer portal which solves this problem. Since it seams there are no relevant changes from 3.0 to 3.0.1 the solution is to tell XCode to use OS 3.0 Support for 3.0.1. OS Devices by linking a directory 3.0.1 to 3.0 within your DeviceSupport directory on your mac.
To do so open your Mac Terminal and type in the following two simple commands :

cd /Applications/Utilities
ln -s /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0\ \(7A341\) /Developer/Platforms/iPhoneOS.platform/DeviceSupport/3.0.1

XCode should now work fine with OS 3.01