camera wouldn't turn OFF!
While taking video with the 18-135mm canon lens, after a while, it would no longer auto focus. Then, I got an error message saying the lens and camera were not communicating. I turned the camera to the "off" position, but it DIDN'T! Turn off that is. I had to remove the battery and put it back in. Sometimes it would auto focus while in video mode, but sometimes I had to turn it to picture mode, hold down the shutter button half way to focus, then switch to video. Anyone have a clue to what is going on? This has happened before, and I'm pretty sure it's this one lens.