This is a BETA version, the stable version which works perfectly with Leopard can be downloaded by single click.
So far I am all happy with the beta. We finally get windows features like "Live pause" (DVR like) and it integrates perfectly with Safari to "rip" flash video which is a life saver for people with unstable connections.
Software vendors post their betas to versiontracker since this site has a special "beta" category and they expect users to report issues rather than posting "1 star" reviews. Don't make companies regret it please.