Have a look here as there is some extra info on rotting cans and a picture of inside http://foc-u.co.uk/index.php/topic,15938.0.html
Yeah i posted on that thread about mine also, the blowing is annoying but not major but wasnt sure if it had any impact on the bike having a vibration/buzz patch at 5k+RPM, a few people have said its just a Fazer thing, but once i enter the 5K RPM range it just buzzes/vibes from there? with no end no matter how far i push her.