iTunes slow to launch video in Snow Leopard

I'm running Snow Leopard (10.6.2 with all recent updates) on a new MacBook Pro, and the first time I launch a video it takes around 20 seconds to launch. Close that one and open a 2nd one and it opens instantly. I did a tweet about it and got a few people saying they have the same problem but didn't see anyone talking about this specific problem in here.

No problems playing the video once it launches, and all other functions are snappy.

Anything i can do about it?