This zip file contains versions of the wxWindows and wxPython binaries that have been compiled with __WXDEBUG__ defined. This adds code to wxWindows that is a bit more agressive about checking parameter values, return values, and etc. When the debugging library senses something is wrong it will popup a message dialog telling you so. Unfortunately the message is specific to the C++ code but it might give you a hint about what went wrong and how to fix it. Another debugging feature is when the wxPython program exits, it will print to stdout information about any wxWindows C++ objects that havn't been properly cleaned up. This archive contains a new wxWindows DLL named wx[version]d.dll that should be copied to the windows system directory or some other directory on the PATH.You will also find replacements for all of wxPython's *.pyd files that are linked to use this DLL. Until I put together a new installer, you'll need to copy things manually. Robin