I am developing an application which is now working under RedHat ES3 w/ GTK, Mac OS X 10.4, and Windows XP.
But on Windows 98, wxFileName::IsFileReadable returns false for a file that is in fact readable. (work around to use wxFileName::FileExists solves the problem).
Built using VC++ 6.0 under Windows XP using standard release DLL libraries of wxWidgets 2.8.3.
I'm not a windows guy, so haven't looked into it further.
Hope someone finds this helpful...
-- Ian