ok i found out what happened. it seems that not only did iTunes lose its info, but iPhoto, safari, firefox, and anything else like those apps did too. the funny thing is that all of the files where still on the computer but nothing could read them. (i found them using finder.) so i restarted the computer and when i logged back on... everything on my desktop was gone! so i freaked out, thinking i was going to have to get professional help. i made one last attempt to fix it, and i found that the computer had made a second folder of my username and put ALL of my files in there, so i moved it back. then i found the reason everything was moved. my username that had ALL of my documents in it was renamed and the computer could no-longer recognize it or read from it. so in the end it was a simple fix. all i had to do was name the username back it to original name then restart the computer again. now all of my bookmarks, music, photos, files, are back to normal. i hope this helps anybody that runs into this problem just as i did.
ps. im running tiger on the very first imac G5 that came out.
