Does iTunes keep track of the hard drive usage of apps that are installed? because after adding a few apps, such as maps, mail, apollo, NES and PDF viewer iTunes still says I have 14 GBs of space left but when I go to add songs, videos, etc., i get the message that my hard drive is full. I have restarted my ipot like 5 times already and it seems to happen mostly after a PDF Viewer is installed (that include PDF viewer from the installs app and the pdf + apache way of viewing PDFs. Can someone help me please because I don't want to have to choose between music, movies, etc. and apps.