 
             return templateActivity({
                 avatar: getUserAvatar(comment.user.pk)
-                userFullName: getUserFullName(comment.user.pk)
+                userFullName: comment.user.name
                 creationDate: moment(comment.created_at).format("DD MMM YYYY HH:mm")
                 comment: comment.comment_html
                 changesText: renderChangesHelperText(comment)

            return $scope.usersById[userId]?.full_name_display

        getUserAvatar = (userId) ->
            return $scope.usersById[userId]?.photo

        countChanges = (comment) ->
            return _.keys(comment.values_diff).length

        renderChange = (change) ->
            return templateActivity({
                avatar: getUserAvatar(change.user.pk)
                userFullName: change.user.name
                creationDate: moment(change.created_at).format("DD MMM YYYY HH:mm")
                comment: change.comment_html
                changes: renderChangeEntries(change, false)
