Another unscheduled parity check here w/6.6.1. I have it set Custom: 07:00, Wednesday of the first week in Mar, Jun, Sep, and Dec. It started up this morning at 7, which is all correct except for the month. I toggled a couple of the variables and re-Apply'd. (EDIT: I changed the time to 10:00, saved, and it just started up again at 10 even though it's still the wrong month. So it doesn't seem to be a saved data format issue.)
Aside from this, it's been very smooth sailing. The new UI looks great on a color calibrated display.