Checking in on the 12th (linked from preview site, but I don't think checkin is part of the preview site) - used to get the message that the e-ticket couldn't be found... this time, I got, a message that I was unable to checkin as the flight was scheduled to leave within an hour. My first pre-coffee panicked thought was that I booked the flight for the wrong day. The I figured it was more likely that they just had a different and still unhelpful error message. Everything worked fine when I tried again 30 seconds later.