The instructions given to the user via elog in pkg_postinstall in the lastfmplayer ebuilds do not work with mozilla-firefox-3.6* (I think not even with firefox-3*). Gnome users can do the following instead: " $ gconftool-2 -t string -s /desktop/gnome/url-handlers/lastfm/command "/usr/bin/lastfm %s" $ gconftool-2 -s /desktop/gnome/url-handlers/lastfm/needs_terminal false -t bool $ gconftool-2 -t bool -s /desktop/gnome/url-handlers/lastfm/enabled true " This also works for chromium by the way. I don't know how to do this for other desktop environments, but the message displayed by the ebuild is definitely no longer appropriate.
Fixed Thanks for reporting