I'm using the latest stable release of foobar2000 -- 1.0.3. After installation of EvilLyrics and restarting foobar, it complains it can't load the plugin, as it was built using an SDK for an older version of foobar2000, or something along those lines.
I downloaded the version 0.9.6 of foo_winamp_spam.dll directly from the author's page:http://chron.visiondesigns.de/foobar2000/#foo_winamp_spam
Whereupon everything worked fine.
There was somewhere around a 60 kb difference in the files' sizes, so it definitely appears to be a different version from whatever was bundled with EvilLyrics. Strange, considering it was released three-and-a-half years ago. d-: