Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7) Occasionally when I sync my iPhones to iTunes and then disconnect, my library will disappear from the phones. The phones show that I have x number of songs, movies, or whatever and the storage capacity shows them still there but my library shows to be empty. It usually comes back if I resync but other times it takes 3-4 tries. This happens on both my jailbroken iPhone 4 and my daughters stock 3GS, both of which are running iOS 4.1 although it did on different version also. Does anybody know what causes this or a way to fix it?