diff --git a/Include/ceval.h b/Include/ceval.h
index 474e3866086..70abbb4c28a 100644
--- a/Include/ceval.h
+++ b/Include/ceval.h
@@ -31,6 +31,8 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 /* Interface to random parts in ceval.c */
 
 PyObject *PyEval_CallObject Py_PROTO((PyObject *, PyObject *));
+PyObject *PyEval_CallObjectWithKeywords
+	Py_PROTO((PyObject *, PyObject *, PyObject *));
 
 PyObject *PyEval_GetBuiltins Py_PROTO((void));
 PyObject *PyEval_GetGlobals Py_PROTO((void));
diff --git a/Include/compile.h b/Include/compile.h
index f311a4ba20d..02d11ddcb82 100644
--- a/Include/compile.h
+++ b/Include/compile.h
@@ -28,25 +28,29 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 ******************************************************************/
 
-/* Definitions for compiled intermediate code */
-
-
-/* An intermediate code fragment contains:
-   - a string that encodes the instructions,
-   - a list of the constants,
-   - a list of the names used,
-   - the filename from which it was compiled,
-   - the name of the object for which it was compiled. */
+/* Definitions for bytecode */
 
+/* Bytecode object */
 typedef struct {
 	PyObject_HEAD
-	PyStringObject *co_code;	/* instruction opcodes */
-	PyObject *co_consts;	/* list of immutable constant objects */
-	PyObject *co_names;	/* list of stringobjects */
-	PyObject *co_filename;	/* string */
-	PyObject *co_name;	/* string */
+	int co_argcount;	/* #arguments, except *args */
+	int co_nlocals;		/* #local variables */
+	int co_flags;		/* CO_..., see below */
+	PyStringObject *co_code; /* instruction opcodes */
+	PyObject *co_consts;	/* list (constants used) */
+	PyObject *co_names;	/* list of strings (names used) */
+	PyObject *co_varnames;	/* tuple of strings (local variable names) */
+	/* The rest doesn't count for hash/cmp */
+	PyObject *co_filename;	/* string (where it was loaded from) */
+	PyObject *co_name;	/* string (name, for reference) */
 } PyCodeObject;
 
+/* Masks for co_flags above */
+#define CO_OPTIMIZED	0x0001
+#define CO_NEWLOCALS	0x0002
+#define CO_VARARGS	0x0004
+#define CO_VARKEYWORDS	0x0008
+
 extern DL_IMPORT(PyTypeObject) PyCode_Type;
 
 #define PyCode_Check(op) ((op)->ob_type == &PyCode_Type)
@@ -55,8 +59,9 @@ extern DL_IMPORT(PyTypeObject) PyCode_Type;
 /* Public interface */
 struct _node; /* Declare the existence of this type */
 PyCodeObject *PyNode_Compile Py_PROTO((struct _node *, char *));
-PyCodeObject *PyCode_New
-	Py_PROTO((PyObject *, PyObject *, PyObject *, PyObject *, PyObject *));
+PyCodeObject *PyCode_New Py_PROTO((
+	int, int, int, PyObject *, PyObject *, PyObject *, PyObject *,
+	PyObject *, PyObject *)); /* same as struct above */
 
 #ifdef __cplusplus
 }
diff --git a/Include/eval.h b/Include/eval.h
index f37482631ca..56f9938df88 100644
--- a/Include/eval.h
+++ b/Include/eval.h
@@ -30,8 +30,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 /* Interface to execute compiled code */
 
-PyObject *PyEval_EvalCode
-	Py_PROTO((PyCodeObject *, PyObject *, PyObject *, PyObject *, PyObject *));
+PyObject *PyEval_EvalCode Py_PROTO((PyCodeObject *, PyObject *, PyObject *));
 
 #ifdef __cplusplus
 }
diff --git a/Include/frameobject.h b/Include/frameobject.h
index e0c94e0861b..a38a85d542a 100644
--- a/Include/frameobject.h
+++ b/Include/frameobject.h
@@ -45,7 +45,6 @@ typedef struct _frame {
 	PyObject *f_locals;	/* local symbol table (PyDictObject) */
 	PyObject *f_owner;	/* owner (e.g. class or module) or NULL */
 	PyObject *f_fastlocals;	/* fast local variables (PyListObject) */
-	PyObject *f_localmap;	/* local variable names (PyDictObject) */
 	PyObject **f_valuestack;	/* malloc'ed array */
 	PyTryBlock *f_blockstack;	/* malloc'ed array */
 	int f_nvalues;		/* size of f_valuestack */
diff --git a/Include/funcobject.h b/Include/funcobject.h
index f618363cf22..2ab46980486 100644
--- a/Include/funcobject.h
+++ b/Include/funcobject.h
@@ -34,10 +34,9 @@ typedef struct {
 	PyObject_HEAD
 	PyObject *func_code;
 	PyObject *func_globals;
-	PyObject *func_name;
-	int	func_argcount;
-	PyObject *func_argdefs;
+	PyObject *func_defaults;
 	PyObject *func_doc;
+	PyObject *func_name;
 } PyFunctionObject;
 
 extern DL_IMPORT(PyTypeObject) PyFunction_Type;
@@ -47,8 +46,8 @@ extern DL_IMPORT(PyTypeObject) PyFunction_Type;
 extern PyObject *PyFunction_New Py_PROTO((PyObject *, PyObject *));
 extern PyObject *PyFunction_GetCode Py_PROTO((PyObject *));
 extern PyObject *PyFunction_GetGlobals Py_PROTO((PyObject *));
-extern PyObject *PyFunction_GetArgStuff Py_PROTO((PyObject *, int *));
-extern int PyFunction_SetArgStuff Py_PROTO((PyObject *, int, PyObject *));
+extern PyObject *PyFunction_GetDefaults Py_PROTO((PyObject *));
+extern int PyFunction_SetDefaults Py_PROTO((PyObject *, PyObject *));
 
 #ifdef __cplusplus
 }
diff --git a/Include/object.h b/Include/object.h
index d1e60be700a..55c972223da 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -217,7 +217,7 @@ typedef struct _typeobject {
 	/* More standard operations (at end for binary compatibility) */
 
 	hashfunc tp_hash;
-	binaryfunc tp_call;
+	ternaryfunc tp_call;
 	reprfunc tp_str;
 
 	/* Space for future expansion */
diff --git a/Include/opcode.h b/Include/opcode.h
index 959bb448835..972558060c7 100644
--- a/Include/opcode.h
+++ b/Include/opcode.h
@@ -40,7 +40,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define UNARY_NEGATIVE	11
 #define UNARY_NOT	12
 #define UNARY_CONVERT	13
-#define UNARY_CALL	14
+
 #define UNARY_INVERT	15
 
 #define BINARY_MULTIPLY	20
@@ -49,7 +49,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define BINARY_ADD	23
 #define BINARY_SUBTRACT	24
 #define BINARY_SUBSCR	25
-#define BINARY_CALL	26
 
 #define SLICE		30
 /* Also uses 31-33 */
@@ -75,13 +74,12 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define PRINT_NEWLINE	72
 
 #define BREAK_LOOP	80
-#define RAISE_EXCEPTION	81
+
 #define LOAD_LOCALS	82
 #define RETURN_VALUE	83
-#define LOAD_GLOBALS	84
+
 #define EXEC_STMT	85
 
-#define BUILD_FUNCTION	86
 #define POP_BLOCK	87
 #define END_FINALLY	88
 #define BUILD_CLASS	89
@@ -125,7 +123,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define SETUP_EXCEPT	121	/* "" */
 #define SETUP_FINALLY	122	/* "" */
 
-#define RESERVE_FAST	123	/* Number of local variables */
 #define LOAD_FAST	124	/* Local variable number */
 #define STORE_FAST	125	/* Local variable number */
 #define DELETE_FAST	126	/* Local variable number */
@@ -139,6 +136,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
 #define RAISE_VARARGS	130	/* Number of raise arguments (1, 2 or 3) */
 #define CALL_FUNCTION	131	/* #args + (#kwargs<<8) */
+#define MAKE_FUNCTION	132	/* #defaults */
 
 /* Comparison operator codes (argument to COMPARE_OP) */
 enum cmp_op {LT, LE, EQ, NE, GT, GE, IN, NOT_IN, IS, IS_NOT, EXC_MATCH, BAD};
diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 44921487100..e60c1d88192 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h
@@ -1 +1 @@
-#define PATCHLEVEL "1.2"
+#define PATCHLEVEL "1.3b1"
diff --git a/Include/traceback.h b/Include/traceback.h
index c04f515c546..ad37dd9cc84 100644
--- a/Include/traceback.h
+++ b/Include/traceback.h
@@ -37,6 +37,10 @@ PyObject *PyTraceBack_Fetch Py_PROTO((void));
 int PyTraceBack_Store Py_PROTO((PyObject *));
 int PyTraceBack_Print Py_PROTO((PyObject *, PyObject *));
 
+/* Reveale traceback type so we can typecheck traceback objects */
+extern PyTypeObject PyTraceback_Type;
+#define PyTraceback_Check(v) ((v)->ob_type == &PyTraceback_Type)
+
 #ifdef __cplusplus
 }
 #endif