QUOTE(rosfrog @ Dec 15 2007, 09:58 AM)

PC is bad news in general, if you ask me...
Have you tried reloading your playlists by going into your music file, then into your itunes library file and opening the default playlist thingy with a right click (asking it to open with iTunes)? If that doesn't work then it appears that the problem is not with iTunes, but with your computer which has eaten all of your music...
Check the recycle bin to make sure that the tunes haven't found their way in there - if they have you can right click to restore them to their original place.
If / when you get your stuff back, try to store all of your music in the iTunes folder, rather than letting iTunes search for it on your PC - in the first case, you will always know where all of it is supposed to be, in the second, iTunes only effectively shows you links to music which could be anywhere, in any folder of your PC.
If these things don't work, try checking out online forums as someone suggested.
Hope it works out for you!
Allan
Hi Allan and everybody - thanks for all suggestions. Can you save playlists in the Itunes folder? The most annoying thing about it is the time it took me painstakingly to copy out the names of hundreds of tracks from 'unknown albums' where track names can't be downloaded. And changing orders of tracks when half the tracks are 'performance' and the other half are 'backing' and you want them together in pairs rather than at opposite ends of the CD... stuff like that. Anyway if all that can be saved in the Itunes folder - titles and playlists - then I needn't get in a panic about it happening again...
OK - I just made a playlist in Itunes, saved it in the Itunes folder of My Music, deleted it in Itunes, wene back to Itunes, located it and opened it in Itunes. Nothing, nada, it didn't appear. So how do you save an Itunes playlist? CAN you save an Itunes playlist? If not, I don't feel like using Itunes any more, not if all your work can be destroyed in one fell swoop as easily as that.