i think the whole point is (well for me anyway) that its not to say i dont regret things that had happened to me in the past which caused me a lot of pain and uncomfort, but rather that through hindsight comes both the acknowledgement of the mistake and the possible reason why making that particular mistake at that point was perhaps in some way necessary.... you know?
i do think its stupid to say "i dont regret anything", and mean it literally, to me that's a cliched statement which is not meant to be taken literally, i think its meant to be understood moreso along lines of what i described earlier, perhaps?
note: i lived in regret for a long time largely because of a career choice that i made when i was younger and it was *extremely* detrimental to my sense of self. its only been in the last two years maybe that i have begun to see that the choice that i made back then wasn't so wrong, given the type of person that i am (and was back then too, but now thats much clearer to me).
ps: i just thought of something. have people seen that movie 'butterfly effect'? overall not a fantastic film or anything but i did find the concept interesting because it touched on this whole idea (which links in with the topic of regret) how if you go back in time and change 'one' mistake the effects may not turn out as well as you had anticipated.