Some of you have been e-mailing in that tasks that are due on Monday, 3/12, and showing up as due today (3/11). This appears to be a bug related to the change to daylight savings time. The good news is that tomorrow the issue no longer occurs, and tasks will appear in the proper group.
I’m investigating the root cause of the problem, and will release an update to make sure that this problem doesn’t occur again when daylight savings time is over, or next year when DST starts again.
Sorry for the inconvenience. The underlying data for your tasks has not been effected, but merely the way they are displayed in TaskTask. I apologize for the issue, and will work to make sure it does not happen again.