Canon EOS REBEL XSi/450D Firmware 1.1.0 Publisher's description
from CANON INC
Canon EOS REBEL XSi/450D Firmware 1.1.0
Firmware Version 1.1.0 incorporates the following improvements.
Supports the AF assist beam features of the new flash, Speedlite 270 EX, which is scheduled to be released in April 2009.In low light situations, the AF assist beam fires to assist with autofocusing.The AF assist beam does not fire if the firmware is Version 1.0.9 or earlier
Version 1.1.0 firmware is for cameras with firmware up to Version 1.0.9. If the camera's firmware is already Version 1.1.0, it is not necessary to update the firmware.
A power failure during the firmware writing operation may disable the camera.
Use a fully charged Battery Pack or dedicated AC Adapter Kit (Optional) ACK-E5 for the firmware update.Do not shut off the power during the firmware writing operation.Do not open the card slot cover during the firmware writing operation.
It is highly recommended to always use the most recent driver version available.
Do not forget to check with our site as often as possible in order to stay updated on the latest drivers, software and games.
Try to set a system restore point before installing a device driver. This will help if you installed a wrong driver. Problems can arise when your hardware device is too old or not supported any longer.