Is it possible to "lose" HD space due to installation failures or similar things? And by "lose" I'll explain through this example: I've dragged items from a USB flash drive to the Trash Bin, but did not empty the trash. After unplugging and replugging, the space the items took up are no longer accessible due to the items being removed, but not deleted (does that make sense?). The reason I ask is because: I've installed/deleted applications on the phone itself that has come into conflict with iTunes; my phone has restarted itself while syncing; and, installation failures have occurred. Could I have lost some space off of the flash HD as a result of these actions?