media-sound/exaile-0.3.2.1 should depend on dev-python/beautifulsoup, because in this version of exaile the "Lyrics Wiki"-plugin is enabled by default and this plugin needs dev-python/beautifulsoup (python-beautifulsoup) to work.
I just tried and it's not enabled by default. And we won't start listing the plug-in dependencies in the exaile ebuild.