i'm not sure what happened but now as iCloud was about to finish off with the last few songs, it causes my entire system to hang and crash. i have rebooted my mac about 8 times because of this. each time i tell it to finish updating my library i get the spinning beach ball of death and where ever i click will also cause it to hang. EG dock is working fine but when i click on it it hangs. if i click on finder it hangs and so on. its like a hanging virus... and it never ends..