Canon has made EOS Rebel T3i/600D Firmware Version 1.0.2
and EOS Rebel T3/110D Firmware Version 1.0.5
available for download.
Firmware Version 1.0.2 incorporates the following fixes and improvements:
1. Fixes a phenomenon in which the AF does not function and the shutter cannot be released during Live-view shooting when the Speedlite 270EX II is attached.
2. Corrects wording in the Italian and Portuguese language menu screens.