Created attachment 39 [details]
情義兩心知.mp3 with Unicode tags which are corrupted by Chain export

Also the user who reported this on Win XP SP 3 and Win 7 said that a message
box appeared "The specified filename could not be converted due to Unicode
character use", though the filename was created correctly.[1] I do not have the
file that caused the message to appear at the moment. 

This bug is not apparently a problem on Ubuntu. There is no problem on Windows
if the tags in the file exported from the chain do not contain Unicode. There
is no problem on Windows with loss of Unicode tags when using export from the
File menu. 


[1] The message presumably comes from the following code at line 166 of
src/Internat.cpp:

#if defined(__WXMSW__)
//
// On Windows, wxString::mb_str() can return a NULL pointer if the
// conversion to multi-byte fails.  So, based on direction intent,
// returns a pointer to an empty string or prompts for a new name.
//
char *Internat::VerifyFilename(const wxString &s, bool input)
{
   static wxCharBuffer buf;
   wxString name = s;

   if (input) {
      if ((char *) (const char *)name.mb_str() == NULL) {
         name = wxEmptyString;
      }
   }
   else {
      wxFileName f(name);
      while ((char *) (const char *)name.mb_str() == NULL) {
         wxMessageBox(_("The specified filename could not be converted due to
Unicode character use."));

         name = FileSelector(_("Specify New Filename:"),
                             NULL,
                             name,
                             f.GetExt(),
                             wxT("*.") + f.GetExt(),
                             wxFD_SAVE | wxRESIZE_BORDER,
                             wxGetTopLevelParent(NULL));
      }
   }