This is probably Australia specific, but I live in qld, a state that doesn't do daylight savings, and this morning my clock changed to Sydney time, putting it 1 hour ahead. I've had reports from people in Adelaide that they're clocks also changed to Sydney time overnight, putting them 30 minutes ahead. This is only with people with os6. Not a big issue, as I am ahead rather than behind for work, but come next daylight saving change when clocks go back it could be a bit messier.