Hi Carl, first off, Merry Christmas to all. I made some test cases to try and reproduce this in a simple example, and at first I wasn't able to, which was making me believe it had something to do with my code, and than I opened the developer tools on safari and started recording to see the FPS, it just started breaking the scrollTo animations. This makes me believe that it's really an FPS issue. On my main page it happens without opening the dev tools and recording, but there are a lot of animations going on, which at some points may bring down FPS. Here is the test url: http://massivedev.itsmassive.com/GSAPTests/ Unfortunatly I can't post here the real page i'm developing because of corporate secrecy. Thank you for your understanding and time. Rui