The music site has informed that they are investigating the leak of some passwords. They still haven´t confirmed how many passwords. As a precaution, if you have an account on this webpage, I advise you to change your password as soon as possible.
“We are currently investigating the leak of some Last.fm user passwords. This follows recent password leaks on other sites, as well as information posted online. As a precautionary measure, we’re asking all our users to change their passwords immediately.”
The leak doesn´t seem to be related to the ones from other sites.