Fix bad select_related call. In Django 1.8, select_related now throws an error if you give it an invalid field. This was happening. Fix that query. Also noticed an extra query generated in the display_post template. Fixed.

#map-canvas {
   width: 720px;
   height: 540px;
   border: 1px solid black;
   margin: 0 auto;
}
#map-info {
   margin-top: 2em;
}
div.band-balloon {
   width: 150px;
   height: 75px;
}