He brings up a good point. I think everyone has a tool in their shop that scares them. For me its the tablesaw. I had an old tablesaw kick a piece of wood the size of my forearm back over my shoulder. Ever since I will think of ways to get around using the tablesaw. My fears are mostly unfounded because the saw I was using was way out of adjustment.
When used properly, power tools are very safe. Its just when you try to use them for somthing that they were not designed for, thats when you get in trouble.
Like gregp said, if it appears worn or out of adjustment, fix it or buy a new one.