I built a webpage for myself with iWeb. On my MacBook, it looks great. However, one friend informed me that when he tried to access it, he got a virus alert saying the site was unsafe. I'm using Zymic free hosting - is that likely the issue, or could it be from iWeb? Next, I accessed my site from a windows computer, only to find that none of my custom fonts were used and spacing was off on various objects. How can I fix the compatibility issues with Windows?