this afternoon, with my computer on and itunes [and nothing else] open, my G4 imac froze. so i restarted, and when i tried later to open itunes, i got a message [that i did not write down] that said something to the effect that the library was not recognized or unrecoverable and when itunes opened up, it was blank -- all the songs, podcasts, playlists, etc., were gone. But then i looked in my [internal] hard drive, and all my music was there. In any case, i'm thinking this used imac i got last month may be a bum machine, but i wonder what went on to have this happen? I hardly have anything on my imac -- nothing in iphoto, only had about 400 songs, one game, a few pdfs, so i don't think it's a space issue. any thoughts/ideas?