OS: Windows 10 - 64bit
When saving an image with meta data in a format that doesn't support meta data there is no warning message "Be careful, saving in this format will lose existing metadata!". The same happens when saving to a format that does support meta data but XnView doesn't support writing the metadata webp, JPG2000, and jxr.
Effect: Irritating behaviour
To reproduce:
1. Open a (JPG) image in XnView's viewer with EXIF meta data.
2. Save the image in PNG format.
Actual behaviour (bug): XnView saves the image. There is no warning that meta data is lost.

Expected behaviour: A message box (warning) with button to proceed or cancel is displayed.
Related topic:
- 0.85: Save to webp loses exif metadata