pyinstaller/pyinstaller — pull request #42 by rassilon (2013-03-20 17:04:21+00:00)
Title: Ensure pywintypes and pythoncom dlls don't get included twice by adding ...

...the dll as a BINARY instead of as a data.

PyInstaller currently can include the dlls more than once if you import a Python Extension (win32evtlog) that has a binary dependency on pywintypes (or pythoncom).