i just got myself a 400D, on the very same night, my Auto Dust Cleaning System is spoiled, I discovered it by turning it off holding the shutter button partially, then I can use the camera perfectly

When I try to clean from Menu, Clean Now function, it displays the infamous Error 99 of Canon DSLR

I turned the auto dust cleansing from menu when it's being switched on or off, then my camera turns on perfectly.. or else i will always get error 99 when i switched on because once it's being switched on, the dust cleansing is activated..

sigh!

hmmmmm well according to the guy, it's a known issue by Canon and this defect is also present in all the 400D he sold so far..

It will be in the next firmware upgrade so I am fine =D

By the way, when I reached there, I didn't tell him what was wrong but he switched the auto dust cleaning system automatically for me in order to make the camera work. That's what I did too yesterday to make the camera work so he knew what was wrong all while.

Please be informed that some EOS 400Ds out there have bad firmware for now. However the dust cleansing system is not needed so much because I won't be changing lens for now.. =D