I have not been able to nail down a specific reason that WordPress failed to post on time last week, so there is a chance it could happen again. If you are seeing this message instead of a new puzzle, it is likely that the new update will not happen until I do it manually, approximately 5.5 hours late.
If this happens, apologies for the delay. I will get the puzzle up as soon as I am home from work. Fingers crossed that this is not necessary and everything proceeds as scheduled.