If you pass a File or Blob of unsupported extension/mimeType to Ti.Media.saveToPhotoGallery() neither of the two callbacks is called and no error is logged.
This is because the code only calls the error callback when it is passed no File or Blob and not when the File or Blob is of unsupported extension/format.
1. Create a default project (that has KS_nav_ui.png in Resources).
2. Run with the sample code and confirm it works.
3. Switch the two var file lines.
4. Run again and confirm neither success nor error is called back and no error is showing in logs either.