Alarm clock doesn't go off when in Flight Mode
So I overslept today - no alarm. And it turned out that my new ONE X doesn't want to sound the alarm, when it is in flight (airplane) mode. This is the case not only with the stock alarm, but also with a couple of other alarm apps I've tried.
I prefer to go flight mode during the night, to make sure there are no random messages through any medium whatsoever. The option "also in silent mode" is ticked on, if this is of any consequence.
Is there anything one can do?