I just bought the new Canon Speedlight 580EX, to use with my EOS 20D. Bought the flash on Tuesday. Took a handful of photos with it. Today, two days later, I turned it on… whirrrr, click click click click, dead. Something in the zooming mechanism is grinding. I have no idea what happened. It wasn’t dropped or shocked in any way. It just up and quit on me.

Sucking.