Ok so today for the first time ever my iTunes randomly deleted all of my playlists. So i looked up a few articles online and tried a few things. First, I took the ituneslibrary.itl file out to the desktop, opened iTunes, pointed iTunes to this file with file>Library>add to library.This did not work. Next, I deleted the iTunes Music Library.xml file (after making a backup) because I have heard that this file will automatically regenerate to fix itself (which it did) but this still did not fix my problem. Next, I went into time machine, grabbed the ituneslibrary.itl file from a day ago, and copied it into the place of the existing file. Now I opened iTunes and this worked, all my playlists were back, until my genius playlists started updating at which time they all disappeared again. So this time, I did the above steps again, but this time i turned off wifi before i opened iTunes and bam, the playlists stayed. But when i turn on wifi, they disappear again. does anyone have any clue whatsoever what is going on here and how I can stop my playlists from deleting?