Using the old nameserver that was in the script, I have had a steady connection for 2+ hours. I will change the script on my N900 and reconnect and see how that goes (2607:FB90:BEEF:A::1).

I believe that is what the ipv6 only setup uses. I was having difficultly last night connecting to google while on ipv6 (most other sites worked fine). As I mentioned TOR (google voice) indicates the network is unreachable (it is using python) and my SIP account is with Gizmo5, which is also a google product. SIP would occasionally connect, but not reliably.