I have noticed the double posting problem comes and goes the trick is not to hit post twice. If I had to guess at the root cause I would say the new site software has random latency problems or a load balancing issue between servers. What happens is the post verbiage remains in the window after the first post and you end up hitting th post button again thinking it hasn't posted. Still I like the new look it and I see a lot of similarities with the software package RC Groups and Giant Scale News sites are using.