It seems that there's a mouse making renovations at the Mall. Anon E Mouse has expanded the area and a new location's been added to it. The main difference for those trying to find their way around is that the sewer entrance has been moved to a bathroom east of the food court. The rats have helpfully put up a sign to direct you to it.
Also, the tally is in for May's bonus hours, with an expansion to the main storyline being chosen.