I attached my Canon 580EX flash to my Canon 6D this evening to take some Halloween shots. Although body and flash usually work seamlessly together, tonight I noticed that the flash kept turning itself off and the only way I could get it to work again was to switch it if and then on again. When it's on, it fires appropriately. Also, the flash head failed to zoom in sync with my lens.
I wondered if this might be a sign that it's time to change the batteries, but the cycle time is still pretty short and I did change batteries recently.
Has some witch or ghost cursed my strobe? Do I need to send it to Canon for a proper exorcism?