Q: I returned home from a business trip last week and, walking up the stairs, one of the steps actually lifted up from the back as I put my foot on it, then flopped back into place as I continued up.

Q.The stairs in my home are in sad shape. One stair tread is cracked and others are scratched from years of abuse. I know I can hide the problem with carpeting, but that's not really my style. What's ...