I've been fighting with this for some time now. I use my camera tethered on a copy stand to shoot macro images for my business. We have 3 of these setups for our business. Immediately after updating to the newest firmware the EOS 3 will crash after a photo is shot or you try to open live view. I now have 2 cameras that will not work for this function on EOS 3 because of the firmware update. I can run it on other tethered shooting programs such as Adobe Lightroom... but not with the EOS 3 program. I updated both cameras the same day at the same time and they both had the same problem after working fine for nearly a year. CANON... fix this.