Index: misc/tabledrag.js
===================================================================
RCS file: /cvs/drupal/drupal/misc/tabledrag.js,v
retrieving revision 1.25
diff -u -p -r1.25 tabledrag.js
--- misc/tabledrag.js	13 Mar 2009 23:15:08 -0000	1.25
+++ misc/tabledrag.js	16 Mar 2009 01:55:33 -0000
@@ -523,7 +523,16 @@ Drupal.tableDrag.prototype.findDropTarge
     var row = rows[n];
     var indentDiff = 0;
     var rowY = $(row).offset().top;
-    var rowHeight = parseInt($(row).outerHeight()) / 2;
+    // Because Safari does not report offsetHeight on table rows, but does on table
+    // cells, grab the firstChild of the row and use that instead.
+    // http://jacob.peargrove.com/blog/2006/technical/table-row-offsettop-bug-in-safari
+    if (row.offsetHeight == 0) {
+      var rowHeight = parseInt(row.firstChild.offsetHeight)/2;
+    }
+    // Other browsers.
+    else {
+      var rowHeight = parseInt(row.offsetHeight)/2;
+    }
 
     // Because we always insert before, we need to offset the height a bit.
     if ((y > (rowY - rowHeight)) && (y < (rowY + rowHeight))) {