Release Issued by Canon:
Firmware Update Ver 1.1.0
Firmware specification changes
This firmware update (Version 1.1.0) incorporates the following fixes and improvements.
Adds support for the new Media Transfer Protocol (MTP) USB protocol.
Corrects errors in the Simplified Chinese menu screens.
The Version 1.1.0 firmware being released this time is for cameras with firmware up to Version 1.0.5. If the camera's firmware is already Version 1.1.0, it is not necessary to update the firmware.
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Canon announces new firmware for EOS Rebel XTi/400D
DPNow Canon announces new firmware for EOS Rebel XTi/400D
New firmware corrects errors in language menus and adds support MTP USB protocol