I think I'm asking for the impossible. I know that asking for access to others pc's would be out of the question, but there should be some mechanism whereby corrections can be made, or sharers could be notified of an error. There are countless errors, especially with older music. Even if we could have a central contact whom we could notify and they in turn could advise the song poster of their error. I realize this might be very difficult, because there could be multiple postings of the same error. And I know from experience that a lot of users don't listen to, verify or even know what they are downloading/sharing. But it happens a lot, and it's frustrating to have to download something, find out it is incorrect, delete it, find another copy and redownload. And if more than one sharer has perpetuated the same error, lot of time can be wasted.