My 17" PowerBook died some months back and a co-worker let me use an iBook. I did some initial setup of it at work and have since migrated to a unibody MacBook. Since then, I have several entries in the Shared section of the Finder sidebar that are not accessible at all as they're behind a corporate firewall and even if they weren't, I don't need access to them. Is there anyway to remove them or force Leopard to "forget" them so I can instead see the machines that are actually on my local network?