--- sonar-server/src/main/webapp/WEB-INF/app/models/sonar/treemap.rb (revision 5616)
+++ sonar-server/src/main/webapp/WEB-INF/app/models/sonar/treemap.rb    (working copy)
@@ -61,7 +61,7 @@
     if size_measure
       resource = snapshot.project
       child = Treemap::Node.new( :id => (id_counter += 1),
-          :size => size_measure.value.to_i||0,
+          :size => size_measure.value.to_f||0,
         :label => resource.name(false),
         :title => escape_javascript(resource.name(true)),
         :tooltip => get_html_tooltip(snapshot, size_measure, color_measure),