Q: My son thought it would be cool to practice golf inside the house and, consequently, he broke one of the louvers on our wood shutters. I am an office worker without a lot of tools, so do I need to ...

My (until now) trusty 40D has developed a very annoying problem, which is that it will sometimes fail to fire the shutter when the shutter release is pushed all the way down. I've turned off AF to ...