There is pixelation on this flash banner it seems to pop up about 10% of the time. It is not because of the browser my guess is the screen resolution, or other applications that are installed into the browser. The file was made with After Effects. How can I fix it?
Another thought: your page has lots of xhtml errors. The helpful w3c provides a free validator at http://validator.w3.org/ which will look through the code of your pages and point out any errors. Browsers have enough difficulty rendering consistently what was intended across different platforms / operating systems when code is accurate: when there are errors, the browser authors have to determine how to interpret what was intended, and different browsers naturally diverge on how to handle non-compliant content. So fixing your html errors will probably be a good thing. http://www.htmlvalidator.com/htmlval/whyvalidate.html http://validator.w3.org/docs/why.html