Apple released iTunes 5 yesterday along with a selection of new hardware. Because I’ve been having trouble with iTunes 4.9 locking up or losing sight of shared music I eagerly upgraded. Initially the downstairs PC refused to see the shared music from the main machine, and the only way to fix the problem was to downgrade to 4.9 again. After more faffing around it appears that on that machine at least, shared music only appears if iTunes is set to show “radio”. You can set this through View – Preferences, then tick “Radio” on the general tab, this bizzarely enables viewing of shared music.
Only time will tell if it fixes the earlier problems.