lib/artwork/model.rb in artwork-0.7.0 vs lib/artwork/model.rb in artwork-0.7.1

@@ -61,9 +61,10 @@
 
     def determine_alternative_size_for(alternative_sizes)
       return unless alternative_sizes
 
       new_size_definition = alternative_sizes \
+        .select { |key, value| key.is_a? Numeric } \
         .sort_by { |max_resolution, size| max_resolution } \
         .find { |max_resolution, size| Artwork.actual_resolution <= max_resolution }
 
       new_size_definition.last if new_size_definition
     end