This unfortunately isn't consistent/reproducible, but this weekend I fired up the app at NASA's Ames research center in Mountain View and as best as I could tell all the directional arrows were pointed 180 degrees in the wrong direction - directly away from the location of the articles. Moving the phone moved the arrows, as you'd expect, maintaining the 180-degree-wrong orientation.
Not reproducible right now - looks fine while here at the office. :/
Phone is a very stock Nexus 4, all latest OS updates installed.