Not a Joost Fan Yet

I have not been impressed.  Many of the shows never start to play, or the start, then I get a message stating they are unavailable.  Definitely BETA.  What will happen when the masses sign up???

I have installed it on my Macbook, both in OS X and Vista.  Also installed on my home Vista box.   On each Vista install, I have gotten the following message which makes no sense to me:
Joost Error Message

Will not be installing on any more of my computers until it is a better system.