iTunes 6.0.2 (and it's predecessors) slow down my system, and I've had it crash on me a number of times recently - everything will freeze up, sometimes the song will keep playing, sometimes it won't, and I'll have to restart because nothing else will respond. I tried clearing the cache, but it still happens. Three times it's corrupted my library, requiring a rebuild. Now, I'm on an iBook G4 with only 256 MB of RAM; I assume that running out of memory is the correct assessment here. Am I right?