DetectFileFormat is identifying Excel file as Word

Using the following code with the attached file, oFormat will be Doc{1}. I was expecting “Unknown”. Is this normal?

Dim oFormat As LoadFormat = Document.DetectFileFormat(szFile)

Thank you for reporting this problem to us. I managed to reproduce this problem and created new issue #4800 in our defect database. I will notify you as soon as it is fixed.
Best regards.

The issues you have found earlier (filed as 4800) have been fixed in this update.