I have a clan challenge game in which my opponent's time bank had completely expired prior to or in just the initial phases of the outage (in fact that was my first indication that there were problems with the site, since I clicked the skull and got the message that timeouts were temporarily suspended). The site came back up, timeouts were still suspended, this opponent still had a skull, but has since made a move.
I looked now, and I see that this player's timebank in this game is at 2 days 21 hours and 56 minutes. This sounds like a timebank credit of over 2 days. What happened here? This 3 day move/ 7 day timebank challenge game has been going on since November and we're only at move 50-something.