Okay i have designed this site and we have a skip intro button that skips this 500 frame animation and just goes to a still shot of the whole thing. A very basic thing. Well I have a preloader at the begninning of the movie and the skip intro button is visible incase someone is not wanting to sit and wait for the animation to load. But if you click the skip intro button before the movie entirely preloader it just goes blank. But if you let it preload once completely then the next time you visit the site you can skip whenever you want. Its really wierd. 
This is the temp place holder please see if you can think on something???
Thanks
