Upgrade to Mavericks? Any chance you’ve seen this or something similar when attempting to sign an app:
code failed to satisfy specified code requirement(s)
If you have recently updated you Xcode version and your favorite re-signing script suddenly does not work…then it might be possible that you have to change codesign_allocate path on your environment variable.
Oliver shares the codesign allocate paths for the various versions of Xcode and includes a shell script to export the appropriate setting based on the version of Xcode installed.