From: Philo D on

>
> My conclusion is that the new QuickTime library handles OGV just fine
> provided you install the XiphQT component (which is how Quick Look can
> play it) but if you want to open it in QuickTime Player you have to use
> the old version 7. I wonder if Apple is planning to fix this?
>

QuickTime X is only the first pass of the new player. It will be a
while before it catches up to the old one.