This has happened before. it's got something to do with the free website offering (for Members) arrangement that we have with Community Architect.
My understanding is that to make that work all traffic must go to their servers first and then traffic meant for ECN gets forwarded to the ECN server. The last time this happened they said there were duplicate DNS records or something like that, which would sometimes get you here, or not, depending on which record was followed.
Anyway, I've emailed them about 10 times and tried to call them (mailbox full) and no response yet.