diff -r ec64d08cd01a Lib/importlib/_bootstrap.py
--- a/Lib/importlib/_bootstrap.py	Tue Jun 05 16:48:38 2012 +0100
+++ b/Lib/importlib/_bootstrap.py	Thu Jun 14 17:21:41 2012 +0100
@@ -304,8 +304,8 @@
 
 SOURCE_SUFFIXES = ['.py']  # _setup() adds .pyw as needed.
 
-DEBUG_BYTECODE_SUFFIXES = ['.pyc']
-OPTIMIZED_BYTECODE_SUFFIXES = ['.pyo']
+DEBUG_BYTECODE_SUFFIXES = ['.pyc', '.pyo']
+OPTIMIZED_BYTECODE_SUFFIXES = ['.pyo', '.pyc']
 if __debug__:
     BYTECODE_SUFFIXES = DEBUG_BYTECODE_SUFFIXES
 else:
diff -r ec64d08cd01a Python/importlib.h
Binary file Python/importlib.h has changed