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My Canon 5D Mark III works fine until I connect  my Speedlite 430EX II.  Here's the exact procedure for duplicating the issue:Power on 5D MkIIIPower on 430EX IIPress Menu button - Flash fires and no menu comes upPress Menu button again - Nothing happ...

Is anyone else having this issue? Since updating firmware on my 5D the ISO button has varying levels of stickiness. Meaning when I press it and move the dial it drops out of ISO mode, sometimes immediately, sometimes after a second, and yet other tim...