Home Sharing feature not working in iTunes 9
I have two Macs on a home network, both updated to iTunes 9.0, both authorized for "home sharing." When I launched iTunes 9 for the first time the Sharing tab was visible; I clicked it to go through authorization process, then it disappeared (once sharing was turned on). That behavior happens on both machines.
PB G4 1.5GHz and Quad-Core Intel tower, Mac OS X (10.5.8)