Right way round
Wrong way round, the clocks went _back_, meaning an extra hour in bed, so the alarm would have gone off an hour too soon, which would mean a "rude awakening"... surely an alarm going off an hour _late_ would be a 'happy, relaxed, refreshed awakening"!?
No, the alarm goes off an hour late, which is a rude awakening if you needed to be up and gone already. This was all discussed in the comments on that article last week, the recurring alarm is set for say 08:00 during summer time. Now summer time is GMT +1 so the alarm is actually set for 07:00 GMT +1 hour. The bug means that when the internal time is set back to GMT, it still adds the hour to the time of the alarm even though it now doesn't need to, hence the alarm goes off an hour after it was meant to.