HTML Code shows up on checkout

Well that would make sense if no one else was also getting the same problem. But a few people have seen the same thing on their computer.

Honestly I'm out of ideas. If it's not the browser, not the ISP, and not the server, there is nothing else left it's it's just purely random.

YOU GUYS WOULD NOT BELIEVE WHAT THE PROBLEM WAS!!!!

It was caused by some corruption in JCK Editor. I uninstalled the plugin and deleted the files and the site works fine.

This really doesn't make sense since I had 2 copies of the website on 2 different other hosts with no problem. They all have the same files.

So Weird!!

Well, problem solved.

Thanks to you all who tried to help, especially you nicolas.