Do the following
- sudo / Developer / Library / uninstall-devtools -mode = all (This will remove the current Xcode installation)
- reboot
- Then install the first old Xcode (3.2 final) in the default folder (/ Developer)
- Then install the new Xcode (3.2.3 GM) in another folder (/ DeveloperBeta)
- . xcode /Developer/Applications/Xcode.app /DeveloperBeta/Applications/Xcode.app
3.2.3 - SDK-, , -SDK, , , GM.