Canon has posted EOS Rebel T3i / 600D Firmware Version 1.0.1
Firmware Version 1.0.1 incorporates the following fixes and changes.
1. Clarifies the feature guide description of the digital zoom function for movie-shooting that appears on the camera’s LCD monitor.
2. Fixes a phenomenon in which, in rare cases, a computer connected to the camera with a USB cable cannot recognize the camera.