I didn't see these 2 message. Guess we post same time
Anyway. I have been built a site before. I know only very little.
Here's how it works:
When you enter site. It check what kind of computer you have:
Windows, Mac, or Linux or other OS. So it can direct you to the right site that support your OS.
Then check what kind of web broswer you have, and again direct you to right site.
Some site didn't check what kind of computer or web browser you have.
It is not just OmniWeb. It might still identifying as Mac. Maybe Apple didn't programming thier site to support OmniWeb. Maybe you could email them about problem then they maybe fix it and then Apple site finally accepts OmniWeb.