OpenVPN Connected but No Internet

I started a thread to discuss the potential changes to the wiki OpenVPN article, as I have seen (and assisted) users having the same issues described here. I have not wanted to change the Wiki without a discussion about it first for a few reasons -- mainly since it is an opportunity to learn (what has worked for me and for those I've helped may be a narrow slice, maybe there is something I don't know or haven't thought about) and as a courtesy to the original author and subsequent contributors so we don't end up having debates/discussions after certain changes take place.