A previously unreleased Nirvana song, "You Know You're Right", was apparently leaked onto the internet last night.
The song was originally supposed to have been the featured song on a new Nirvana boxed set. The release of the boxed set was cancelled due to legal issues with Courtney Love. It will, however, appear on a greatest hits album due out in October.
The song is available for download on many websites, and is also said to be available on person to person file sharing programs.