Noticed something weird this morning - the times displayed on the instrument panel and the touch screen were out of synch by about 45 seconds. They'd always been in exact synch previously, turning over together with the top of the hour 'beep' on BBC radio, so I thought they were locked together to the GPS signal. Apparently not. Haven't re-set the displays to see if this fixes it, but I was surprised to find the difference. Recently had the OTA update to 5.8.10. Any thoughts?