Xcode iOS organizer submit to app store yields “The archive is invalid” error

Question

I just switched from Xcode 3 to 4. When I attempt to upload an app that I have archived to the organizer, I receive this error:

The archive is invalid

Answer 1

I recently switched to a new MacBook Pro and had XCode 4 installed from a Time Machine drive via the Migration Assistant.

Re-installing XCode 4 with the Unix Tools fixed it.

For some reason those files weren't getting copied across with Migration Assistant.