Videolan offers an update for VLC, now available in version 0.9.9. It is currently only available for Mac Intel, the PPC version remains in version 0.ç.8 for the moment. This update fixes some bugs, improves playback performance on Mac Intel et add an experimental player for REal videos in version 3.0 and 4.0.
To download it: http://www.videolan.org/
