Navigation bar themes aren't working correctly in general, but only on the forum.
I have the navigation bar theme set to default without the stripe, but there is a stripe on the forum but not the main page/library/wishlist, so this seems to be affecting everyone. I'm using the latest version of the script with the latest version of Tampermonkey and the latest version of Chrome on Windows 10. Thanks for looking into it, Barefoot_Monkey. I love your script.