Navigation menu has no background in IE

https://validator.w3.org/check?uri=http%3A%2F%2Fomahanighthawks.com%2F&charset=%28detect+automatically%29&doctype=Inline&ss=1&group=0&user-agent=W3C_Validator%2F1.2

Something is up with the site. It can’t be checked by the validator. I’m at work, and I can’t even get to your site due to our work net filters…. says the site is suspicious.

Chances are, if something is throwing the validator, it would also throw IE

That is weird. That says it is getting weird characters that aren’t UTF-8, but those characters don’t appear in the page source, nor in my saving the page from the server.

I tried verifying the CSS directly here:

https://jigsaw.w3.org

I paid someone to develop a theme for us, and begged them to use a standards compliant base theme. Instead, they used a commercial/proprietary theme that isn’t so standards compliant. They charged me a fortune, left me with something broken, and I’m trying to fix it.