Index: src/org/python/modules/thread/PyLocal.java
===================================================================
--- src/org/python/modules/thread/PyLocal.java	(revision 7161)
+++ src/org/python/modules/thread/PyLocal.java	(working copy)
@@ -59,7 +59,10 @@
         if (where[0] == TYPE && args.length > 0) {
             throw Py.TypeError("Initialization arguments are not supported");
         }
-        this.args = args;
+        // Don't stomp args when init is called by a derived class (issue1667)
+        if (this.args == null) {
+            this.args = args;
+        }
         this.keywords = keywords;
     }
 
@@ -76,7 +79,7 @@
     }
 
     @Override
-    public synchronized PyObject fastGetDict() {
+    public PyObject fastGetDict() {
         PyDictionary ldict = tdict.get();
         if (ldict == null) {
             ldict = new PyDictionary();