« on: October 12, 2012, 08:26:29 PM »
ditto here too. Having some of the same troubles with Ai Servo mode. One thing I've noticed is mostly when using Canon battery grip, make sure batteries are fully charged when you start and the connection to the body is tight and clean. I'm using a 70-200 2.8L II and a 70-300L and occasionally a 200 f2.8L prime. Not too pleased with this latest firmware update.