Ouch. I don't think you're to blame Dave, I don't think anyone was to 'blame'.....just two people getting on each others nerves a bit.....it happens in the best of families unfortunately.
I too come on here nearly every day, and I've learnt a lot from both Richard and Denny, I enjoy their posts, and would be sorry to see either of them leave.

Let's hope they can bury the hatchet. (And not in each other's heads!)