In the downstream build view, the links to the icons are broken. In the HTML source, they look like <img ... src="http://localhost:8080/jenkins//images/16x16/blue.png" />, but getting that URL directly results in a 404. From looking at other pages, the correct link should be something like src="/jenkins/static/9ed5d2e9/images/16x16/blue.png". (The port number was purportedly addressed in JENKINS-11010, but the path is still incorrect.)