when viewing images in the maniphest image viewer long images which require scrolling cause the view footer to move and obscure the image. can be tested by opening image viewer on image in this comment https://phabricator.wikimedia.org/T67079#688253
Firefox fits image to page and there is no scroll.
Chrome does provide scroll and the Download bar does eat a few pixel but is not as bad as what Jared shows.
A minor detail, but there is something fishy indeed.
Frequently we will be uploading very long assets (mobile designs which span multiple "screens" in length) this is not particular to WMF so anyone else using phab for mobile work will likely run into this.
my browsers was Chrome 40.0.2214.10 beta (64-bit)