Надо попробовать.

[dyemen]

"
Hot Pixels / Stuck Pixels (EOS 350D) - a cure?
...
Then with the lens on the camera and the lens cap on the lens, and the lens pointing to the floor, I activated the 'Sensor Clean' function for about 30 seconds. (Obviously with a lens on, I made no effort to clean the sensor before, after or during this operation!). At the end of the 30 seconds, I switched the camera off to close the shutter and return the mirror.
...
In the pictures taken after the sensor clean though, all the stuck/hot pixels had gone and the entire images were free from any hot/stuck pixels. The problem had been completely cured.
"

http://forums.dpreview.com/forums/readflat.asp?forum=1031&message=18151631&changemode=1

Краткий перевод: на сапопе 350Д запуск очистки матрицы с накрученной и закрытой крышкой линзой автоматически запускает ремаппинг битых пикселов.
Правда там многие говорят что лажа и не работает.

АПД: Чудес на свете не бывает, да. Урбан легенд.