[python-win32] overlay icons handler freezes file dialog

[TK Soh]

Greeting.

I have a shell extension that provide the overlay icons on Explorer,
using pythonwin bundled with ActivePython 2.5.1.1. However, when it
extension is installed, it causes the win32gui.GetSaveFileNameW file
dialog to freeze.

During the investigation, I noticed that by returning None from
GetOverlayInfo method (essentially causes a traceback during calls to
GetOverlayInfo) , the dialog would work fine. This of course doesn't
help, since it would render the shell extension useless.

I wonder if anyone can provide some clue or pointer on how I can
resolve this issue.

TIA