Exactly - continuous deployment is about moving some/most testing to production, not eliminating it altogether. Acceptance testing the system once deployed is

Exactly - continuous deployment is about moving some/most testing to production, not eliminating it altogether. Acceptance testing the system once deployed is the cornerstone of organisational acceptance of the CD doctrine - errors will always happen, it's just that they can now be fixed much faster in production. Using an acceptance test suite as a deployment safety harness should dramatically increase the quality of tests, and hopefully the application too.