In the stable version, auto-replay saves everything, failures and solutions, without annotation. This is not what people need. I didn't know NL does it like that, and therefore have interpreted möbius's replies completely wrong.
Auto-save only successes, and timestamping them, is most likely exactly what pack designers need. At the very least, they should try this again in the next release.
This makes manual saves way less important, and therefore manual saves should also be timestamped, not overwriting, and not popping up the modal box.
-- Simon