I am not sure if you have a Canon 40D, but if you have, and you live in Norway, this Canon EOS 40D Firmware Update might be of interest to you. According to imaging-resource.com the following issues have been fixed.
1. Fixes a phenomenon in which Image Stabilization operation emits a sound when certain buttons are pressed, with the EF-S 55-250mm f/4-5.6 IS lens attached to the camera.
2. Fixes a phenomenon in which the Image Stabilization operation emits a sound from the lens when IS lenses are attached to the camera.
3. Fixes a phenomenon in which a part of the image looks unnatural when reviewed on the LCD.
4. Corrects errors in the Spanish and Norwegian menu screens.
You better do like me and visit the Canon EOS 40D firmware download page.