Emily,

Have you taken it back in to the shop at all since you first got the bike? Cables tend to stretch out in the first 100-200 miles on a new bike. It's a good idea to take it back in and have them check it over after the initial break-in time. You shouldn't have to put up with noise or rough shifting. The LBS's around here all offer a free check-up on a new bike. And they should NEVER laugh at you, for any questions you have! How else are you going to learn, if not by asking.

annie