# i compiled those plugins. they might not work for you.
# this is how i made my audacious2 to scrobble again...

cd ~
wget http://fly5.kapsi.fi/misc/misc/aud2scrob/lastfm.so
wget http://fly5.kapsi.fi/misc/misc/aud2scrob/scrobbler.so
mv lastfm.so scrobbler.so ~/.local/share/audacious/Plugins/