Re-Import of Model Project Set leaves project with multiple errors

I've exported an error-free project as a Model Project Set (attached). I then delete the original project, then re-import the project set via (Import... > General > Existing Projects into Workspace). Upon import, the project has 27 errors. The model "AllCustomerAccounts" appears to be corrupted. If I (1) close project, (2) reopen project, (3) rebuild project the errors are resolved. This may be OS-specific, Barry could not reproduce with same version of JBDS on a different 32bit Ubuntu linux.