Pressing the escape key while browsing any build page returns to that job's top level page. This can be frustrating as navigating back to the page you were viewing on can be hard, especially if you don't know what build number it was.

More unfortunately, this occurs if you are searching a page using the browser's builtin search and dismiss it with the escape key. 

I would argue that escape should't do anything in general, but it definitely should't be doing anything when a search dialog is being dismissed.