Someone asked a somehow complex question, and I first answered fast, and iteratively improved my answer, so it was better presented and with the ideas better exposed and organized.
I found out after all my hard work, I was no longer worthy of my reputation (because of the hard work =/).
Someone asked this same question here, and one of the arguments for this "feature" was that "Editing a post will bump the question to the front". At least from what I notice now, this doesn't seem to be true anymore (I always get my answer in a random position, at least that's what it looks like).
This is a real incentive not to try to improve your answer too much. =(
Also, will I lose my reputation I won before it becoming a CW when there is a rep recalc?