Python 3.3 64-bit seems to compile one of my files incorrectly. Specifically, os.path.isdir returns True for a nonexistent folder. The important point is that the code works correctly when it is performed step-by-step in pdb.

Python version:
Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:57:17) [MSC v.1600 64 bit (AMD64)] on win32

OS:
Windows 8 64-bit

The code works fine in Python 3.2.3 32-bit on Windows XP.

My project is quite complex and it interacts with other software packages. I tried to make a reduced test-case but I could not reproduce the problem this way. What files do you need for processing this bug report? Will e.g. the source file in question and the corresponding compiled file (*.pyc) be enough? Or should I upload the whole project here, along with the instructions on how to run it?