Unfortunately there's no link to give you because it's on an Intranet and not accessible from the outside.
However, I just clicked on "view source" for the page, copied the page's entire source code and placed it in my editor and looked at it. The question mark is not there!
Then I viewed it in a browser -- from the editor I had pasted it into -- and it doesn't show up there either.
How peculiar! It's not a mirage because on my site's page I did a text search for a question mark and it finds it.