0.95: Categories (keywords) for .DNG files not saved

[karolleon]

XnView: MP 0.95 - 64 bit
OS: Windows 10 64bit
Camera: Pentax K-x, Pentax K-3

Chosen categories (tags, keywords) are not saved when it comes to .DNG (Pentax) files.

Effect: The assigned keywords are displayed in XnView but are nowhere to be found on the 'XMP' or 'EXIF' tabs nor they can be found in Windows' File Explorer. Keywords for other file types are properly displayed in File Explorer.

To reproduce:
1. Choose a Pentax .DNG file (I am not sure about other .DNG files)
2. Assign a category (keywords)
3. It doesn't show up on the 'EXIF' or 'XMP' tabs
4. It doesn't show up in File Explorer

Expected behaviour: Information on categories (keywords) is displayed on the metadata (EXIF/XMP) tabs and is displayed by File Explorer (in which these are called 'Tags').

[xnview]

your setting are configured to use sidecar?