I have a friend who is really "into" this particular study (the mandala effect).
(Unrelated -- Hi Mycroft, bit late to the party here I know!)
For people who are really tracking this, the interesting thing is that it becomes not just an issue of "I think I remember it like so." It becomes an issue of, "Less than 24 hours ago, we marveled at how it was different 24 hours before, when we had looked carefully at it because we thought it had changed. Now it is pointedly different than it was just yesterday!" -- and three days later, it is different AGAIN.
Now this is not the same (to me) as just thinking you remember something. This is more akin to someone who has really studied a given subject WELL, and so when they say they remember it differently, to me that holds a lot more weight for taking seriously.
Much of the stuff you hear about is trivial and likely misremembered to begin with, like lines from movies and things like that. The stuff that is actually changing is... terrifyingly huge. Countries, continents, the human body, animals, massive events.
One either has to conclude that otherwise rational people serious about it are hallucinating constantly, and simultaneously separately but in tandem with numerous others; and one can only push that theory so far before it becomes obtuse denial; or start to consider that maybe there is a sort of gradual-collision-and-merge (perhaps sometimes cessation) of multiple timelines going on.
It's a little much to wrap my brain around. I think it creates massive cognitive dissonance in nearly everybody who doesn't have a pretty strong open-belief-space for parallel realities to begin with, and they immediately begin -- often with great evangelical enthusiasm -- going on about why everybody is totally wrong and it can't be happening.
I don't know, but I do know that I take seriously some of the people talking about the major stuff, and if they were to tell me with the same seriousness and detail about anything else, I'd believe them.
PJ