It's not uncommon, if cycling the ignition does not fix it then try pulling the radio fuses (can't remember off hand which they are but they are on the fuse card) and leave them out for 5 mins.
My car did this... It stopped when I took the sat nav power cable out of the cigarette lighter for some reason! Were you running a sat nav or mobile phone charger from your cigarette lighter? .... Just a thought!
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