Warren,
I know that I haven't been involved in this thread, and I KNOW that others will have much better replies to your post. I do want to ask one thing of you though; if an intelligent designer designed "proofreading" mechanisms within cellular bodies, wouldn't better proofreaders have been designed?
We know there are copy errors and transcription errors. There are so many episodes of copying going on that many errors get evened out in the mix. This sounds more like an evolutionary adaptation than a "supremely integrated technology".
I'm sure others who are more qualified will follow-up with your post, but even as uneducated in this topic as I am, I can see the flaws.
------------------
Asgara
"An unexamined life is not worth living" Socrates via Plato