My application compiles and runs successfully. To avoid the 'signature too large to embed' error I was getting during code-signing I set 'Other Code Signing Flags' --timestamp --signature-size=12000 (workaround posted by Quinn in another thread)
Now when I attempt to export an archive of the application from Organizer, I once again fail with 'signature too large to embed (size limitation of on-disk representation)' when re-signing.
It appears that when the application is re-signed by the export process the --signature-size=12000 attribute is not inherited.
How can I work around this?