All reports of gzip-file-is-not-multi-arch-same-safe for the archive. The extended description of this tag is:

The gzip file contains a timestamp that will differ between architectures. Multi-Arch: same implies all shared files must be byte-for-byte identical.

This can usually be fixed by passing -n to gzip.

Severity: important, Certainty: certain

Check: files, Type: binary, udeb

This tag has not been emitted in any package tested by Lintian.