It introduces many new codecs, various playback core improvements (frame-by-frame, live-recording, instant pausing, etc.), interface improvements, new features and many bugfixes.
VLC 1.0.0-rc1, codename Goldeneye, is a test release of the 1.0.0 version of VLC. If you have not already upgraded to VLC version 0.9.5, please do so urgently (exploits for vulnerabilities found in older versions are widely available as of today). The VideoLAN team will continue to provide major or security-related bug fixes for the VLC media player 0.9-bugfix branch. Binary releases of the 0.8.6-bugfix branch had already stopped as of July 2008. Effective immediately, there will be no more security and critical fixes for VLC 0.8.6. As a consequence, it has not been possible to put sufficient efforts to ensure adequate continued quality of the 0.8.6-bugfix branch. After several several call for help, it is apparent that there is no interest in the community to maintain the 0.8.6 branch of the VLC media player. The VideoLAN team ceases all form of support for VLC media player 0.8.6-bugfix tree.