They know about it -- it's an artifact of the copy of Webkit they are using, I believe, and not in Omni's code.
If you see something like this in the future and want to make sure someone at Omni actually sees it, you should use Help->Send Feedback or email
omniweb@omnigroup.com, because there's no mechanism in place to make sure that they see all forum postings, but there is one to make sure they see all the email.