Okay, Frank sold me. Being able to cut the trim in the same room AND knowing the required clearance trumps potential damage my knucklehead installers. Check with your carpet guys to find out how much space under the base they recommend for your type of carpet.
Peter, I've ALWAYS seen the carpet edge tucked behind the tack strip and under the baseboard, at least when it's being installed in a room designed for carpet (as opposed to being installed over original hardwood the owners didn't want to refinish).
