Index: tabledrag.js
===================================================================
RCS file: /cvs/drupal/drupal/misc/tabledrag.js,v
retrieving revision 1.13.2.4
diff -u -r1.13.2.4 tabledrag.js
--- tabledrag.js	17 Sep 2008 07:59:39 -0000	1.13.2.4
+++ tabledrag.js	24 Oct 2008 17:49:21 -0000
@@ -110,10 +110,10 @@
     }
 
     // Hide the column containing this field.
-    if (hidden && cell[0] && cell.css('display') != 'none') {
+    if (hidden && cell[0]) {
       // Add 1 to our indexes. The nth-child selector is 1 based, not 0 based.
       var columnIndex = $('td', cell.parent()).index(cell.get(0)) + 1;
-      var headerIndex = $('td:not(:hidden)', cell.parent()).index(cell.get(0)) + 1;
+      var headerIndex = $('td', cell.parent()).index(cell.get(0)) + 1;
       $('tr', this.table).each(function(){
         var row = $(this);
         var parentTag = row.parent().get(0).tagName.toLowerCase();