Could you post some details about this or make a write-up? I'd be interested in reading more about this.
1. I engaged with Gemini.
2. I found the results wanting, and pasted them into comment threads elsewhere on the internet, observing that they tended to support the common criticism of LLMs as being "meaning-blind".
3. Later, I went back and viewed the "history" of my "saved" session.
4. My prompts were not changed, but the responses from Gemini were different. Because of the comment threads, it was easy for me to verify that I was remembering the original exchange correctly and Google was indulging in some revision of history.
Rewriting history requires computes which is more malicious. Why would someone burn compute to rewrite your stuff given that rewrites are not free? Once again not defending google trying to think through what's going on.
I can't think of any reason it would make sense to do that, though.
This would be a major tech news story. "Google LLM rewriting user history" would be a scandal. And since online evidence is used in court, it could have significant legal implications. You'd be helping people.
This is much too important to merely be a comment on HN.