Hi,
If I create a .docx file using MS Word and run "file -i myfile.docx" on Linux, I'll get the correct MIME type returned.
If I look at its header, it shows the expected: 50 4B 03 04 14 00 06 00 08.
However, once I use io3.Save and ZipPartStore to save the file, running "file -i mynewfile.docx" on Linux will return "application/octet-stream".
If I look at its header, it shows this instead: 50 4B ...