Slart: The potential problem occurs when it is not the author, or the author's licensee who first publishes/popularizes the work. Exactly ;)
Sort of kinda like saying; the potential problem is when a guy walks into a 5 star restaurant enjoy's the 5 course pig-out meal then walk's out without paying for it --- dang it LOL!
Be it; unintentional infringement (use) or with intention to blatantly rip off another authors work(s)
Furthermore there is no doubt that the copyright registration process is not perfect (I'll explain more later) and in regards to other issues;
To put your reply back in context and with what I said above; regardless if the work(s) (music) is registered at the copyright office or NOT there is still a potential problem that it's NOT the original author(s) work(s) --- the copyright registration process is not perfect;
I agree with
Herb; copyright registration is a waste of money especially since most writers/musicians will be lucky to break even = earn zero $$$ dang it and since there's thousands of releases everyday 'most' writers/musicians will be lucky if anyone else besides their family and close friends and their forum buddy's had heard their songs;
now in that context I strongly believe that the 'Australian' system; no registration required in regards to copyright protection makes more sense as it simplifies the system and removes unnecessary added cost!!
In regards to the Internet; I agree it's oh so easy for 'anyone' to publish their work(s) --- but when writers/band release/publish their work(s) there is generally a clause in the agreement (or site's TOS) concerning author(s) and copyrights; there are penalties for submitting false claims; writers/musicians work(s) can be removed!