I don't know if bending a cable will affect its performance, but its probably not a good idea.
Just tagged you on another topic (JL Audio CR-1).
As far as the cable thing, yeah.. probably not ideal with a drastic bend that could weaken the metal, but man... worrying about bending a cable a bit that's designed to be pliable is overkill...
At any rate, I wasn't intending to single you out.. I just go a bit nuts with all the miro-detail worrying that goes on in our hobby....
@ozzy - I think what I find most curious is your willingness to sell one power cord before having the opportunity to verify that the new one is indeed preferred. I recognize that the power cords you're using represent a much more significant impact than anything that I own, but I still hang on to the old until I know that I've moved on.