It was good, but it delivered it's message badly.
They should have stuck to the "traditional" 3 timezones (past/pres/future) to explain the interconnectivity, ditched the stupid "birthmark" shit (Are these all fewking Harry Potter wannabe's??), and told the story that way.
Don't get me wrong, the 5-6 timeframes was BETTER, but I am hardly surprised it tanked with them. Peeps don't go to movies to think, they go for eye candy.
Forget about the mainstream peeps...this is not for them. What did you think personally about the film? My take on the birthmarks was like yours...until about the 5th time I watched it. Then it came to mean something on a very deep level. Each timeline had one character who had the birthmark, and it was a different character each time. I took it as meaning that the same "soul" had reincarnated in a different body. In a nutshell, the movie was saying "We are one" or "The one is Many". Each timeline representing an aspect of this soul learning from itself. Did you go to see it or do you have it where you can watch it over and over?