Index: src/webapp/components/pager/js/Pager.js
===================================================================
--- src/webapp/components/pager/js/Pager.js	(revision 7164)
+++ src/webapp/components/pager/js/Pager.js	(working copy)
@@ -296,13 +296,14 @@
                 value: fluid.pager.fetchValue(overallThat, dataModel, i, columnDef.valuebinding, roots)
             };
         }
-        var columnType = typeof sortrecs[0].value;
-        function sortfunc(arec, brec) {
-            var a = arec.value;
-            var b = brec.value;
-            return a === b? 0 : (a > b? model.sortDir : -model.sortDir); 
-        }
-        sortrecs.sort(sortfunc);
+        if (columnDef.sortable === true) {
+            function sortfunc(arec, brec) {
+                var a = arec.value;
+                var b = brec.value;
+                return a === b? 0 : (a > b? model.sortDir : -model.sortDir); 
+            }
+            sortrecs.sort(sortfunc);
+        }
         return fluid.transform(sortrecs, function (row) {return row.index; });
     };