Renamed. The image was actually the small version.

app/views/packages/grid.slim

@@ -8,14 +8,14 @@
     // Search form
     = render 'packages/searchfield'
 
-// Grid view
+// Grid view of packages
 .grid-x
   .small-9.large-10.cell
     - if @packages.length>0
       .grid-x.grid-margin-x.small-up-1.medium-up-2.large-up-3 data-equalizer=true data-equalize-on="medium"
         - @packages.all.each do |pkg|
           .cell.pkgcard data-equalizer-watch=true
-            = render partial: 'packages/grid_thumbnail', locals: { pkg: pkg }
+            = render partial: 'packages/grid_small_image', locals: { pkg: pkg }
 
     - else
       = render 'packages/noresults'