diff -urN r1458/Src/IronPython/Runtime/Operations/Ops.cs wc/Src/IronPython/Runtime/Operations/Ops.cs
--- r1458/Src/IronPython/Runtime/Operations/Ops.cs	2006-07-19 10:56:14.000000000 +0900
+++ wc/Src/IronPython/Runtime/Operations/Ops.cs	2006-07-19 15:24:46.000000000 +0900
@@ -1333,7 +1333,7 @@
             }
 
             List allArgs = List.MakeEmptyList(args.Length + 10);
-            allArgs.AddRange(args);
+            allArgs.AddRange<object>(args);
             IEnumerator e = Ops.GetEnumerator(argsTuple);
             while (e.MoveNext()) allArgs.AddNoLock(e.Current);
 
@@ -1410,7 +1410,7 @@
             }
 
             List allArgs = List.MakeEmptyList(args.Length + 10);
-            allArgs.AddRange(args);
+            allArgs.AddRange<object>(args);
             IEnumerator e = Ops.GetEnumerator(argsTuple);
             while (e.MoveNext()) allArgs.AddNoLock(e.Current);