r> Do you still have ADSL connected? Where is the HE tunnel terminated? If
 r> it is terminated to the ADSL IPv4 interface, then IPv6 connections do
 r> work when ADSL is up.

   The ADSL modem is totally disconnected. Everything goes via the 3G router 
now.

   Unfortunately my port forwarding computer, that's been steady as a rock for 
more than a decade, now behaves very erratic rebooting sometimes several times 
an hour. Twelve hours ago it froze completely, and I didn't notice it until 
just now.

   I hate it when computers don't behave the way I expect them to...  :(


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