There is nothing funny in the console.
iTunes starts up fine and I can be using it with no problem, then all of a sudden it goes white like in the screenshot above.
When it does this, music still plays and my iPod carries on syncing until it's done.
Sometimes the interface returns to normal, but usually I have to quite and start the app again.
I think it's a problem with iTunes 8, not a settings issue.
Giaguara :
I did install the newest quicktime update that came out around the same time as iTunes 8. When I installed the app I may have been running Dreamweaver CS3 and Photoshop CS3.
I have perian installed.